diff --git a/app/Checks.php b/app/Checks.php
index 6dcdce4375..40f0177a29 100644
--- a/app/Checks.php
+++ b/app/Checks.php
@@ -40,9 +40,9 @@ class Checks
     public static function preAutoload()
     {
         // Check PHP version otherwise it will just say server error
-        if (version_compare('7.1.3', PHP_VERSION, '>=')) {
+        if (version_compare('7.2.5', PHP_VERSION, '>=')) {
             self::printMessage(
-                'PHP version 7.1.3 or newer is required to run LibreNMS',
+                'PHP version 7.2.5 or newer is required to run LibreNMS',
                 null,
                 true
             );
diff --git a/app/Http/Controllers/Auth/ConfirmPasswordController.php b/app/Http/Controllers/Auth/ConfirmPasswordController.php
new file mode 100644
index 0000000000..138c1f08a2
--- /dev/null
+++ b/app/Http/Controllers/Auth/ConfirmPasswordController.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Http\Controllers\Controller;
+use App\Providers\RouteServiceProvider;
+use Illuminate\Foundation\Auth\ConfirmsPasswords;
+
+class ConfirmPasswordController extends Controller
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Confirm Password Controller
+    |--------------------------------------------------------------------------
+    |
+    | This controller is responsible for handling password confirmations and
+    | uses a simple trait to include the behavior. You're free to explore
+    | this trait and override any functions that require customization.
+    |
+    */
+
+    use ConfirmsPasswords;
+
+    /**
+     * Where to redirect users when the intended url fails.
+     *
+     * @var string
+     */
+    protected $redirectTo = RouteServiceProvider::HOME;
+
+    /**
+     * Create a new controller instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        $this->middleware('auth');
+    }
+}
diff --git a/app/Http/Controllers/Auth/ForgotPasswordController.php b/app/Http/Controllers/Auth/ForgotPasswordController.php
index 6a247fefd0..465c39ccf9 100644
--- a/app/Http/Controllers/Auth/ForgotPasswordController.php
+++ b/app/Http/Controllers/Auth/ForgotPasswordController.php
@@ -19,14 +19,4 @@ class ForgotPasswordController extends Controller
     */
 
     use SendsPasswordResetEmails;
-
-    /**
-     * Create a new controller instance.
-     *
-     * @return void
-     */
-    public function __construct()
-    {
-        $this->middleware('guest');
-    }
 }
diff --git a/app/Http/Controllers/Auth/LoginController.php b/app/Http/Controllers/Auth/LoginController.php
index ba23dd48b7..048e825687 100644
--- a/app/Http/Controllers/Auth/LoginController.php
+++ b/app/Http/Controllers/Auth/LoginController.php
@@ -4,6 +4,7 @@ namespace App\Http\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
 use App\Models\Device;
+use App\Providers\RouteServiceProvider;
 use Illuminate\Foundation\Auth\AuthenticatesUsers;
 use LibreNMS\Config;
 
@@ -27,7 +28,7 @@ class LoginController extends Controller
      *
      * @var string
      */
-    protected $redirectTo = '/';
+    protected $redirectTo = RouteServiceProvider::HOME;
 
     /**
      * Create a new controller instance.
diff --git a/app/Http/Controllers/Auth/RegisterController.php b/app/Http/Controllers/Auth/RegisterController.php
index 0e8d66aa16..a540bce162 100644
--- a/app/Http/Controllers/Auth/RegisterController.php
+++ b/app/Http/Controllers/Auth/RegisterController.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Auth;
 
+use App\Providers\RouteServiceProvider;
 use App\User;
 use App\Http\Controllers\Controller;
 use Illuminate\Support\Facades\Hash;
@@ -28,7 +29,7 @@ class RegisterController extends Controller
      *
      * @var string
      */
-    protected $redirectTo = '/home';
+    protected $redirectTo = RouteServiceProvider::HOME;
 
     /**
      * Create a new controller instance.
diff --git a/app/Http/Controllers/Auth/ResetPasswordController.php b/app/Http/Controllers/Auth/ResetPasswordController.php
index cf726eecdf..b1726a3648 100644
--- a/app/Http/Controllers/Auth/ResetPasswordController.php
+++ b/app/Http/Controllers/Auth/ResetPasswordController.php
@@ -3,6 +3,7 @@
 namespace App\Http\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
+use App\Providers\RouteServiceProvider;
 use Illuminate\Foundation\Auth\ResetsPasswords;
 
 class ResetPasswordController extends Controller
@@ -25,15 +26,5 @@ class ResetPasswordController extends Controller
      *
      * @var string
      */
-    protected $redirectTo = '/home';
-
-    /**
-     * Create a new controller instance.
-     *
-     * @return void
-     */
-    public function __construct()
-    {
-        $this->middleware('guest');
-    }
+    protected $redirectTo = RouteServiceProvider::HOME;
 }
diff --git a/app/Http/Controllers/Auth/VerificationController.php b/app/Http/Controllers/Auth/VerificationController.php
index 23a43a84d7..5e749af86f 100644
--- a/app/Http/Controllers/Auth/VerificationController.php
+++ b/app/Http/Controllers/Auth/VerificationController.php
@@ -3,6 +3,7 @@
 namespace App\Http\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
+use App\Providers\RouteServiceProvider;
 use Illuminate\Foundation\Auth\VerifiesEmails;
 
 class VerificationController extends Controller
@@ -25,7 +26,7 @@ class VerificationController extends Controller
      *
      * @var string
      */
-    protected $redirectTo = '/home';
+    protected $redirectTo = RouteServiceProvider::HOME;
 
     /**
      * Create a new controller instance.
diff --git a/app/Http/Kernel.php b/app/Http/Kernel.php
index 1a92ac081e..461beeb77b 100644
--- a/app/Http/Kernel.php
+++ b/app/Http/Kernel.php
@@ -15,11 +15,11 @@ class Kernel extends HttpKernel
      * @var array
      */
     protected $middleware = [
-        \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
+        \App\Http\Middleware\TrustProxies::class,
+        \App\Http\Middleware\CheckForMaintenanceMode::class,
         \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
         \App\Http\Middleware\TrimStrings::class,
         \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
-        \Fideloper\Proxy\TrustProxies::class,
     ];
 
     /**
@@ -47,7 +47,7 @@ class Kernel extends HttpKernel
         ],
 
         'api' => [
-            'bindings',
+            \Illuminate\Routing\Middleware\SubstituteBindings::class,
             'auth:token',
             \Spatie\Cors\Cors::class,
         ],
@@ -61,7 +61,7 @@ class Kernel extends HttpKernel
      * @var array
      */
     protected $routeMiddleware = [
-        'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
+        'auth' => \App\Http\Middleware\Authenticate::class,
         '2fa' => \App\Http\Middleware\VerifyTwoFactor::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
@@ -69,6 +69,7 @@ class Kernel extends HttpKernel
         'can' => \Illuminate\Auth\Middleware\Authorize::class,
         'deny-demo' => \App\Http\Middleware\DenyDemoUser::class,
         'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
+        'password.confirm' => \Illuminate\Auth\Middleware\RequirePassword::class,
         'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
         'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
@@ -84,7 +85,8 @@ class Kernel extends HttpKernel
     protected $middlewarePriority = [
         \Illuminate\Session\Middleware\StartSession::class,
         \Illuminate\View\Middleware\ShareErrorsFromSession::class,
-        \Illuminate\Auth\Middleware\Authenticate::class,
+        \App\Http\Middleware\Authenticate::class,
+        \Illuminate\Routing\Middleware\ThrottleRequests::class,
         \Illuminate\Session\Middleware\AuthenticateSession::class,
         \Illuminate\Routing\Middleware\SubstituteBindings::class,
         \Illuminate\Auth\Middleware\Authorize::class,
diff --git a/app/Http/Middleware/Authenticate.php b/app/Http/Middleware/Authenticate.php
new file mode 100644
index 0000000000..704089a7fe
--- /dev/null
+++ b/app/Http/Middleware/Authenticate.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Auth\Middleware\Authenticate as Middleware;
+
+class Authenticate extends Middleware
+{
+    /**
+     * Get the path the user should be redirected to when they are not authenticated.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return string|null
+     */
+    protected function redirectTo($request)
+    {
+        if (! $request->expectsJson()) {
+            return route('login');
+        }
+    }
+}
diff --git a/app/Http/Middleware/CheckForMaintenanceMode.php b/app/Http/Middleware/CheckForMaintenanceMode.php
new file mode 100644
index 0000000000..35b9824bae
--- /dev/null
+++ b/app/Http/Middleware/CheckForMaintenanceMode.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode as Middleware;
+
+class CheckForMaintenanceMode extends Middleware
+{
+    /**
+     * The URIs that should be reachable while maintenance mode is enabled.
+     *
+     * @var array
+     */
+    protected $except = [
+        //
+    ];
+}
diff --git a/app/Http/Middleware/RedirectIfAuthenticated.php b/app/Http/Middleware/RedirectIfAuthenticated.php
index e27860e24e..2395ddccf9 100644
--- a/app/Http/Middleware/RedirectIfAuthenticated.php
+++ b/app/Http/Middleware/RedirectIfAuthenticated.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Middleware;
 
+use App\Providers\RouteServiceProvider;
 use Closure;
 use Illuminate\Support\Facades\Auth;
 
@@ -18,7 +19,7 @@ class RedirectIfAuthenticated
     public function handle($request, Closure $next, $guard = null)
     {
         if (Auth::guard($guard)->check()) {
-            return redirect('/');
+            return redirect(RouteServiceProvider::HOME);
         }
 
         return $next($request);
diff --git a/app/Http/Middleware/TrustProxies.php b/app/Http/Middleware/TrustProxies.php
new file mode 100644
index 0000000000..ee5b5958ed
--- /dev/null
+++ b/app/Http/Middleware/TrustProxies.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Fideloper\Proxy\TrustProxies as Middleware;
+use Illuminate\Http\Request;
+
+class TrustProxies extends Middleware
+{
+    /**
+     * The trusted proxies for this application.
+     *
+     * @var array|string
+     */
+    protected $proxies;
+
+    /**
+     * The headers that should be used to detect proxies.
+     *
+     * @var int
+     */
+    protected $headers = Request::HEADER_X_FORWARDED_ALL;
+}
diff --git a/app/Policies/DeviceGroupPolicy.php b/app/Policies/DeviceGroupPolicy.php
index c916cd919f..92ba308825 100644
--- a/app/Policies/DeviceGroupPolicy.php
+++ b/app/Policies/DeviceGroupPolicy.php
@@ -40,6 +40,17 @@ class DeviceGroupPolicy
         return false;
     }
 
+    /**
+     * Determine whether the user can view any device group.
+     *
+     * @param  \App\User $user
+     * @return mixed
+     */
+    public function viewAny(User $user)
+    {
+        return false;
+    }
+
     /**
      * Determine whether the user can create device groups.
      *
diff --git a/app/Policies/UserPolicy.php b/app/Policies/UserPolicy.php
index d4799c6d34..8bcb8ea24f 100644
--- a/app/Policies/UserPolicy.php
+++ b/app/Policies/UserPolicy.php
@@ -32,6 +32,18 @@ class UserPolicy
         return $user->isAdmin() || $target->is($user);
     }
 
+    /**
+     * Determine whether the user can view any user.
+     *
+     * @param  \App\User $user
+     * @return mixed
+     */
+    public function viewAny(User $user)
+    {
+        return $user->isAdmin();
+    }
+
+
     /**
      * Determine whether the user can create users.
      *
diff --git a/app/Providers/RouteServiceProvider.php b/app/Providers/RouteServiceProvider.php
index 5ea48d39d4..dc44ebec11 100644
--- a/app/Providers/RouteServiceProvider.php
+++ b/app/Providers/RouteServiceProvider.php
@@ -16,6 +16,13 @@ class RouteServiceProvider extends ServiceProvider
      */
     protected $namespace = 'App\Http\Controllers';
 
+    /**
+     * The path to the "home" route for your application.
+     *
+     * @var string
+     */
+    public const HOME = '/';
+
     /**
      * Define your route model bindings, pattern filters, etc.
      *
diff --git a/app/Providers/ViewServiceProvider.php b/app/Providers/ViewServiceProvider.php
deleted file mode 100644
index 720b0e6161..0000000000
--- a/app/Providers/ViewServiceProvider.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-/**
- * ViewServiceProvider.php
- *
- * Safely fall back to Laravel view service provider if String Blade Compiler is missing
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * @package    LibreNMS
- * @link       http://librenms.org
- * @copyright  2018 Tony Murray
- * @author     Tony Murray <murraytony@gmail.com>
- */
-
-namespace App\Providers;
-
-class ViewServiceProvider extends \Illuminate\View\ViewServiceProvider
-{
-    public function register()
-    {
-        if (class_exists('Wpb\String_Blade_Compiler\ViewServiceProvider')) {
-            $this->app->register('Wpb\String_Blade_Compiler\ViewServiceProvider');
-        } else {
-            $this->app->register('Illuminate\View\ViewServiceProvider');
-        }
-    }
-
-    public function boot()
-    {
-        if (!class_exists('Wpb\String_Blade_Compiler\ViewServiceProvider')) {
-            \Toastr::error('Dependencies missing, check <a href="validate">validate</a>');
-        }
-    }
-}
diff --git a/composer.json b/composer.json
index c45a0f08a4..43ecc5019d 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,15 @@
     "name": "librenms/librenms",
     "description": "A fully featured network monitoring system that provides a wealth of features and device support.",
     "type": "project",
-    "keywords": ["network", "monitoring", "discovery", "alerting", "billing", "snmp", "distributed"],
+    "keywords": [
+        "network",
+        "monitoring",
+        "discovery",
+        "alerting",
+        "billing",
+        "snmp",
+        "distributed"
+    ],
     "homepage": "http://www.librenms.org/",
     "license": "GPL-3.0-or-later",
     "support": {
@@ -12,15 +20,8 @@
         "issues": "https://github.com/librenms/librenms/issues/",
         "irc": "irc://irc.freenode.org/#librenms"
     },
-    "repositories":
-    [
-      {
-        "type": "vcs",
-        "url": "https://github.com/librenms/StringBladeCompiler"
-      }
-    ],
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.2",
         "ext-curl": "*",
         "ext-gd": "*",
         "ext-json": "*",
@@ -32,13 +33,15 @@
         "amenadiel/jpgraph": "^3.6",
         "clue/socket-raw": "^1.4",
         "dapphp/radius": "^2.0",
-        "darkghosthunter/larapoke": "^3.1",
+        "darkghosthunter/larapoke": "^4.1",
         "doctrine/dbal": "^2.9",
         "easybook/geshi": "^1.0.8",
         "ezyang/htmlpurifier": "^4.8",
         "fico7489/laravel-pivot": "^3.0",
+        "fideloper/proxy": "^4.0",
         "influxdb/influxdb-php": "^1.14",
-        "laravel/laravel": "5.8.*",
+        "laravel/framework": "^6.18",
+        "laravel/tinker": "^2.0",
         "martinlindhe/laravel-vue-i18n-generator": "^0.1.42",
         "oriceon/toastr-5-laravel": "dev-master",
         "pear/console_color2": "^0.1",
@@ -46,27 +49,26 @@
         "php-amqplib/php-amqplib": "^2.0",
         "phpmailer/phpmailer": "~6.0",
         "rmccue/requests": "^1.7",
-        "spatie/laravel-cors": "1.3.*",
+        "spatie/laravel-cors": "^1.6",
         "symfony/yaml": "^4.0",
         "tecnickcom/tcpdf": "~6.2.0",
-        "tightenco/ziggy": "^0.7.1",
-        "wpb/string-blade-compiler": "3.8.x-dev",
+        "tightenco/ziggy": "^0.8.0",
+        "wpb/string-blade-compiler": "4.0.x-dev",
         "xjtuwangke/passwordhash": "dev-master"
     },
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.2",
         "barryvdh/laravel-ide-helper": "^2.6",
-        "beyondcode/laravel-dump-server": "^1.0",
-        "filp/whoops": "^2.0",
-        "fzaninotto/faker": "^1.4",
+        "fzaninotto/faker": "^1.9.1",
         "justinrainbow/json-schema": "^5.2",
-        "laravel/dusk": "^5.0",
+        "laravel/dusk": "^5.8",
         "mockery/mockery": "^1.0",
         "nunomaduro/collision": "^3.0",
         "php-parallel-lint/php-parallel-lint": "^1.1",
         "phpunit/phpunit": "^8.0",
         "squizlabs/php_codesniffer": "^3.5",
-        "staudenmeir/dusk-updater": "^1.1"
+        "staudenmeir/dusk-updater": "^1.1",
+        "facade/ignition": "^1.4"
     },
     "suggest": {
         "ext-memcached": "Required if you utilize distributed polling",
@@ -87,7 +89,7 @@
         "psr-4": {
             "App\\": "app",
             "LibreNMS\\": "LibreNMS",
-            "LibreNMS\\Plugins\\" : "html/plugins",
+            "LibreNMS\\Plugins\\": "html/plugins",
             "LibreNMS\\Tests\\": "tests"
         },
         "files": [
diff --git a/composer.lock b/composer.lock
index 079effb473..19b023d0e9 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0e63b9a2283fe51ee594adc2574952ad",
+    "content-hash": "458c9a095abed15368b926e597c9facb",
     "packages": [
         {
             "name": "amenadiel/jpgraph",
@@ -183,29 +183,28 @@
         },
         {
             "name": "darkghosthunter/larapoke",
-            "version": "v3.1.0",
+            "version": "v4.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/DarkGhostHunter/Larapoke.git",
-                "reference": "308b018001c7ad039a66fb2d4557b29ebe772ea9"
+                "reference": "8e38b83e552fb556c214fae8354ec54909f4107b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/DarkGhostHunter/Larapoke/zipball/308b018001c7ad039a66fb2d4557b29ebe772ea9",
-                "reference": "308b018001c7ad039a66fb2d4557b29ebe772ea9",
+                "url": "https://api.github.com/repos/DarkGhostHunter/Larapoke/zipball/8e38b83e552fb556c214fae8354ec54909f4107b",
+                "reference": "8e38b83e552fb556c214fae8354ec54909f4107b",
                 "shasum": ""
             },
             "require": {
-                "illuminate/http": "5.8.*",
-                "illuminate/routing": "5.8.*",
-                "illuminate/support": "5.8.*",
-                "illuminate/view": "5.8.*",
-                "php": ">=7.1.3"
+                "illuminate/http": "^6.0||^7.0",
+                "illuminate/routing": "^6.0||^7.0",
+                "illuminate/support": "^6.0||^7.0",
+                "illuminate/view": "^6.0||^7.0",
+                "php": "^7.2"
             },
             "require-dev": {
-                "mockery/mockery": "1.2.*",
-                "orchestra/testbench": "3.8.*",
-                "orchestra/testbench-dusk": "3.8.x@dev"
+                "laravel/ui": "^1.0||^2.0",
+                "orchestra/testbench": "^4.1||^5.0"
             },
             "type": "library",
             "extra": {
@@ -227,11 +226,11 @@
             "authors": [
                 {
                     "name": "Italo Baeza C.",
-                    "email": "DarkGhostHunter@Gmail.com"
+                    "email": "darkghosthunter@gmail.com"
                 }
             ],
             "description": "Keep your forms alive, avoid TokenMismatchException by gently poking your Laravel app",
-            "time": "2019-03-19T18:55:42+00:00"
+            "time": "2020-03-05T18:10:50+00:00"
         },
         {
             "name": "dnoegel/php-xdg-base-dir",
@@ -350,31 +349,32 @@
         },
         {
             "name": "doctrine/dbal",
-            "version": "v2.9.3",
+            "version": "2.10.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/dbal.git",
-                "reference": "7345cd59edfa2036eb0fa4264b77ae2576842035"
+                "reference": "aab745e7b6b2de3b47019da81e7225e14dcfdac8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/dbal/zipball/7345cd59edfa2036eb0fa4264b77ae2576842035",
-                "reference": "7345cd59edfa2036eb0fa4264b77ae2576842035",
+                "url": "https://api.github.com/repos/doctrine/dbal/zipball/aab745e7b6b2de3b47019da81e7225e14dcfdac8",
+                "reference": "aab745e7b6b2de3b47019da81e7225e14dcfdac8",
                 "shasum": ""
             },
             "require": {
                 "doctrine/cache": "^1.0",
                 "doctrine/event-manager": "^1.0",
                 "ext-pdo": "*",
-                "php": "^7.1"
+                "php": "^7.2"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^5.0",
-                "jetbrains/phpstorm-stubs": "^2018.1.2",
-                "phpstan/phpstan": "^0.10.1",
-                "phpunit/phpunit": "^7.4",
-                "symfony/console": "^2.0.5|^3.0|^4.0",
-                "symfony/phpunit-bridge": "^3.4.5|^4.0.5"
+                "doctrine/coding-standard": "^6.0",
+                "jetbrains/phpstorm-stubs": "^2019.1",
+                "nikic/php-parser": "^4.4",
+                "phpstan/phpstan": "^0.12",
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@@ -385,7 +385,7 @@
             "type": "library",
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-                    "dev-master": "2.9.x-dev",
+                    "dev-master": "2.10.x-dev",
                     "dev-develop": "3.0.x-dev"
                 }
             },
@@ -421,14 +421,39 @@
             "keywords": [
                 "abstraction",
                 "database",
+                "db2",
                 "dbal",
+                "mariadb",
+                "mssql",
                 "mysql",
-                "persistence",
+                "oci8",
+                "oracle",
+                "pdo",
                 "pgsql",
-                "php",
-                "queryobject"
+                "postgresql",
+                "queryobject",
+                "sasql",
+                "sql",
+                "sqlanywhere",
+                "sqlite",
+                "sqlserver",
+                "sqlsrv"
             ],
-            "time": "2019-11-02T22:19:34+00:00"
+            "funding": [
+                {
+                    "url": "https://www.doctrine-project.org/sponsorship.html",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.patreon.com/phpdoctrine",
+                    "type": "patreon"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Fdbal",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-04-20T17:19:26+00:00"
         },
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             "name": "doctrine/event-manager",
@@ -508,33 +533,37 @@
         },
         {
             "name": "doctrine/inflector",
-            "version": "1.3.1",
+            "version": "2.0.1",
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                 "type": "git",
                 "url": "https://github.com/doctrine/inflector.git",
-                "reference": "ec3a55242203ffa6a4b27c58176da97ff0a7aec1"
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+                "php": "^7.2"
             },
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-                "phpunit/phpunit": "^6.2"
+                "doctrine/coding-standard": "^7.0",
+                "phpstan/phpstan": "^0.11",
+                "phpstan/phpstan-phpunit": "^0.11",
+                "phpstan/phpstan-strict-rules": "^0.11",
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0"
             },
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-                    "dev-master": "1.3.x-dev"
+                    "dev-master": "2.0.x-dev"
                 }
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                 "psr-4": {
-                    "Doctrine\\Common\\Inflector\\": "lib/Doctrine/Common/Inflector"
+                    "Doctrine\\Inflector\\": "lib/Doctrine/Inflector"
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@@ -563,40 +592,62 @@
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                 }
             ],
-            "description": "Common String Manipulations with regard to casing and singular/plural rules.",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "PHP Doctrine Inflector is a small library that can perform string manipulations with regard to upper/lowercase and singular/plural forms of words.",
+            "homepage": "https://www.doctrine-project.org/projects/inflector.html",
             "keywords": [
                 "inflection",
-                "pluralize",
-                "singularize",
-                "string"
+                "inflector",
+                "lowercase",
+                "manipulation",
+                "php",
+                "plural",
+                "singular",
+                "strings",
+                "uppercase",
+                "words"
             ],
-            "time": "2019-10-30T19:59:35+00:00"
+            "funding": [
+                {
+                    "url": "https://www.doctrine-project.org/sponsorship.html",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://www.patreon.com/phpdoctrine",
+                    "type": "patreon"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Finflector",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-05-11T11:25:59+00:00"
         },
         {
             "name": "doctrine/lexer",
-            "version": "1.0.2",
+            "version": "1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/lexer.git",
-                "reference": "1febd6c3ef84253d7c815bed85fc622ad207a9f8"
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-                "php": ">=5.3.2"
+                "php": "^7.2"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.5"
+                "doctrine/coding-standard": "^6.0",
+                "phpstan/phpstan": "^0.11.8",
+                "phpunit/phpunit": "^8.2"
             },
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             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.2.x-dev"
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@@ -609,14 +660,14 @@
                 "MIT"
             ],
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-                {
-                    "name": "Roman Borschel",
-                    "email": "roman@code-factory.org"
-                },
                 {
                     "name": "Guilherme Blanco",
                     "email": "guilhermeblanco@gmail.com"
                 },
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
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                     "name": "Johannes Schmitt",
                     "email": "schmittjoh@gmail.com"
@@ -631,7 +682,7 @@
                 "parser",
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             ],
-            "time": "2019-06-08T11:03:04+00:00"
+            "time": "2019-10-30T14:39:59+00:00"
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@@ -791,52 +842,6 @@
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-            },
-            "type": "library",
-            "autoload": {
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-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
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-                    "name": "Emanuil Rusev",
-                    "email": "hello@erusev.com",
-                    "homepage": "http://erusev.com"
-                }
-            ],
-            "description": "Parser for Markdown.",
-            "homepage": "http://parsedown.org",
-            "keywords": [
-                "markdown",
-                "parser"
-            ],
-            "time": "2019-12-30T22:54:17+00:00"
-        },
         {
             "name": "ezyang/htmlpurifier",
             "version": "v4.12.0",
@@ -990,23 +995,24 @@
         },
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.2",
+            "version": "6.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "43ece0e75098b7ecd8d13918293029e555a50f82"
+                "reference": "aab4ebd862aa7d04f01a4b51849d657db56d882e"
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+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/aab4ebd862aa7d04f01a4b51849d657db56d882e",
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                 "ext-json": "*",
                 "guzzlehttp/promises": "^1.0",
                 "guzzlehttp/psr7": "^1.6.1",
-                "php": ">=5.5"
+                "php": ">=5.5",
+                "symfony/polyfill-intl-idn": "^1.11"
             },
             "require-dev": {
                 "ext-curl": "*",
@@ -1014,7 +1020,6 @@
                 "psr/log": "^1.1"
             },
             "suggest": {
-                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
                 "psr/log": "Required for using the Log middleware"
             },
             "type": "library",
@@ -1053,7 +1058,7 @@
                 "rest",
                 "web service"
             ],
-            "time": "2019-12-23T11:57:10+00:00"
+            "time": "2020-04-18T10:38:46+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -1238,135 +1243,45 @@
             ],
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         },
-        {
-            "name": "jakub-onderka/php-console-color",
-            "version": "v0.2",
-            "source": {
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-                "url": "https://github.com/JakubOnderka/PHP-Console-Color.git",
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-                "jakub-onderka/php-parallel-lint": "1.0",
-                "jakub-onderka/php-var-dump-check": "0.*",
-                "phpunit/phpunit": "~4.3",
-                "squizlabs/php_codesniffer": "1.*"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "JakubOnderka\\PhpConsoleColor\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
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-            ],
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-                    "email": "jakub.onderka@gmail.com"
-                }
-            ],
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-            "version": "v0.4",
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-                "url": "https://github.com/JakubOnderka/PHP-Console-Highlighter.git",
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-            "autoload": {
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-                    "email": "acci@acci.cz",
-                    "homepage": "http://www.acci.cz/"
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-            "time": "2018-09-29T18:48:56+00:00"
-        },
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-            "version": "v5.8.37",
+            "version": "v6.18.14",
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                 "dragonmantank/cron-expression": "^2.0",
-                "egulias/email-validator": "^2.0",
-                "erusev/parsedown": "^1.7",
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                 "ext-json": "*",
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                 "ext-openssl": "*",
+                "league/commonmark": "^1.3",
                 "league/flysystem": "^1.0.8",
-                "monolog/monolog": "^1.12",
-                "nesbot/carbon": "^1.26.3 || ^2.0",
+                "monolog/monolog": "^1.12|^2.0",
+                "nesbot/carbon": "^2.0",
                 "opis/closure": "^3.1",
-                "php": "^7.1.3",
+                "php": "^7.2",
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                 "psr/simple-cache": "^1.0",
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-                "symfony/process": "^4.2",
-                "symfony/routing": "^4.2",
-                "symfony/var-dumper": "^4.2",
+                "symfony/console": "^4.3.4",
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+                "symfony/finder": "^4.3.4",
+                "symfony/http-foundation": "^4.3.4",
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@@ -1406,47 +1321,45 @@
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                 "doctrine/dbal": "^2.6",
-                "filp/whoops": "^2.1.4",
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+                "guzzlehttp/guzzle": "^6.3|^7.0",
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-                "true/punycode": "^2.1"
+                "symfony/cache": "^4.3.4"
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-                "aws/aws-sdk-php": "Required to use the SQS queue driver and SES mail driver (^3.0).",
+                "aws/aws-sdk-php": "Required to use the SQS queue driver, DynamoDb failed job storage and SES mail driver (^3.0).",
                 "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6).",
                 "ext-gd": "Required to use Illuminate\\Http\\Testing\\FileFactory::image().",
+                "ext-memcached": "Required to use the memcache cache driver.",
                 "ext-pcntl": "Required to use all features of the queue worker.",
                 "ext-posix": "Required to use all features of the queue worker.",
-                "filp/whoops": "Required for friendly error pages in development (^2.1.4).",
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-                "laravel/tinker": "Required to use the tinker console command (^1.0).",
+                "ext-redis": "Required to use the Redis cache and queue drivers (^4.0|^5.0).",
+                "filp/whoops": "Required for friendly error pages in development (^2.4).",
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+                "laravel/tinker": "Required to use the tinker console command (^2.0).",
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                 "moontoast/math": "Required to use ordered UUIDs (^1.1).",
-                "nexmo/client": "Required to use the Nexmo transport (^1.0).",
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-                "symfony/css-selector": "Required to use some of the crawler integration testing tools (^4.2).",
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-                "symfony/psr-http-message-bridge": "Required to use PSR-7 bridging features (^1.1).",
+                "psr/http-message": "Required to allow Storage::put to accept a StreamInterface (^1.0).",
+                "pusher/pusher-php-server": "Required to use the Pusher broadcast driver (^4.0).",
+                "symfony/cache": "Required to PSR-6 cache bridge (^4.3.4).",
+                "symfony/psr-http-message-bridge": "Required to use PSR-7 bridging features (^1.2).",
                 "wildbit/swiftmailer-postmark": "Required to use Postmark mail driver (^3.0)."
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             "extra": {
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-                    "dev-master": "5.8-dev"
+                    "dev-master": "6.x-dev"
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@@ -1474,94 +1387,41 @@
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@@ -1814,25 +1777,26 @@
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@@ -1850,7 +1814,8 @@
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@@ -1885,20 +1850,30 @@
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+                    "url": "https://tidelift.com/funding/github/packagist/nesbot/carbon",
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@@ -1937,7 +1912,7 @@
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@@ -2210,16 +2185,16 @@
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@@ -2274,6 +2244,11 @@
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+                    "email": "github@ramuno.lt",
+                    "role": "Maintainer"
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@@ -2283,7 +2258,7 @@
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@@ -2404,16 +2379,16 @@
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@@ -2704,32 +2679,30 @@
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@@ -2774,7 +2747,7 @@
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@@ -2954,25 +2927,25 @@
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-                "reference": "63a995caa1ca9e5590304cd845c15ad6d482a62a",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/6568f4687e5b41b054365f9ae03fcb1ed5f2069b",
+                "reference": "6568f4687e5b41b054365f9ae03fcb1ed5f2069b",
                 "shasum": ""
             },
             "require": {
                 "php": ">=7.1"
             },
-            "require-dev": {
-                "phpunit/phpunit": "~6"
-            },
             "type": "library",
             "extra": {
                 "branch-alias": {
@@ -6326,45 +6805,42 @@
                 "reflection",
                 "static analysis"
             ],
-            "time": "2018-08-07T13:53:10+00:00"
+            "time": "2020-04-27T09:25:28+00:00"
         },
         {
             "name": "phpdocumentor/reflection-docblock",
-            "version": "4.3.4",
+            "version": "5.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
-                "reference": "da3fd972d6bafd628114f7e7e036f45944b62e9c"
+                "reference": "cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/da3fd972d6bafd628114f7e7e036f45944b62e9c",
-                "reference": "da3fd972d6bafd628114f7e7e036f45944b62e9c",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e",
+                "reference": "cd72d394ca794d3466a3b2fc09d5a6c1dc86b47e",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0",
-                "phpdocumentor/reflection-common": "^1.0.0 || ^2.0.0",
-                "phpdocumentor/type-resolver": "~0.4 || ^1.0.0",
-                "webmozart/assert": "^1.0"
+                "ext-filter": "^7.1",
+                "php": "^7.2",
+                "phpdocumentor/reflection-common": "^2.0",
+                "phpdocumentor/type-resolver": "^1.0",
+                "webmozart/assert": "^1"
             },
             "require-dev": {
-                "doctrine/instantiator": "^1.0.5",
-                "mockery/mockery": "^1.0",
-                "phpdocumentor/type-resolver": "0.4.*",
-                "phpunit/phpunit": "^6.4"
+                "doctrine/instantiator": "^1",
+                "mockery/mockery": "^1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.x-dev"
+                    "dev-master": "5.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "phpDocumentor\\Reflection\\": [
-                        "src/"
-                    ]
+                    "phpDocumentor\\Reflection\\": "src"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -6375,33 +6851,36 @@
                 {
                     "name": "Mike van Riel",
                     "email": "me@mikevanriel.com"
+                },
+                {
+                    "name": "Jaap van Otterdijk",
+                    "email": "account@ijaap.nl"
                 }
             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "time": "2019-12-28T18:55:12+00:00"
+            "time": "2020-02-22T12:28:44+00:00"
         },
         {
             "name": "phpdocumentor/type-resolver",
-            "version": "1.0.1",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "2e32a6d48972b2c1976ed5d8967145b6cec4a4a9"
+                "reference": "7462d5f123dfc080dfdf26897032a6513644fc95"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/2e32a6d48972b2c1976ed5d8967145b6cec4a4a9",
-                "reference": "2e32a6d48972b2c1976ed5d8967145b6cec4a4a9",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/7462d5f123dfc080dfdf26897032a6513644fc95",
+                "reference": "7462d5f123dfc080dfdf26897032a6513644fc95",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1",
+                "php": "^7.2",
                 "phpdocumentor/reflection-common": "^2.0"
             },
             "require-dev": {
-                "ext-tokenizer": "^7.1",
-                "mockery/mockery": "~1",
-                "phpunit/phpunit": "^7.0"
+                "ext-tokenizer": "^7.2",
+                "mockery/mockery": "~1"
             },
             "type": "library",
             "extra": {
@@ -6425,7 +6904,7 @@
                 }
             ],
             "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
-            "time": "2019-08-22T18:11:29+00:00"
+            "time": "2020-02-18T18:59:58+00:00"
         },
         {
             "name": "phpspec/prophecy",
@@ -6835,6 +7314,81 @@
             ],
             "time": "2020-04-23T04:39:42+00:00"
         },
+        {
+            "name": "scrivo/highlight.php",
+            "version": "v9.18.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/scrivo/highlight.php.git",
+                "reference": "52fc21c99fd888e33aed4879e55a3646f8d40558"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/scrivo/highlight.php/zipball/52fc21c99fd888e33aed4879e55a3646f8d40558",
+                "reference": "52fc21c99fd888e33aed4879e55a3646f8d40558",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "ext-mbstring": "*",
+                "php": ">=5.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8|^5.7",
+                "sabberworm/php-css-parser": "^8.3",
+                "symfony/finder": "^2.8|^3.4",
+                "symfony/var-dumper": "^2.8|^3.4"
+            },
+            "suggest": {
+                "ext-dom": "Needed to make use of the features in the utilities namespace"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "Highlight\\": "",
+                    "HighlightUtilities\\": ""
+                },
+                "files": [
+                    "HighlightUtilities/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Geert Bergman",
+                    "homepage": "http://www.scrivo.org/",
+                    "role": "Project Author"
+                },
+                {
+                    "name": "Vladimir Jimenez",
+                    "homepage": "https://allejo.io",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "Martin Folkers",
+                    "homepage": "https://twobrain.io",
+                    "role": "Contributor"
+                }
+            ],
+            "description": "Server side syntax highlighter that supports 185 languages. It's a PHP port of highlight.js",
+            "keywords": [
+                "code",
+                "highlight",
+                "highlight.js",
+                "highlight.php",
+                "syntax"
+            ],
+            "funding": [
+                {
+                    "url": "https://github.com/allejo",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-03-02T05:59:21+00:00"
+        },
         {
             "name": "sebastian/code-unit-reverse-lookup",
             "version": "1.0.1",
@@ -7452,20 +8006,20 @@
         },
         {
             "name": "seld/jsonlint",
-            "version": "1.7.2",
+            "version": "1.8.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/jsonlint.git",
-                "reference": "e2e5d290e4d2a4f0eb449f510071392e00e10d19"
+                "reference": "ff2aa5420bfbc296cf6a0bc785fa5b35736de7c1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/jsonlint/zipball/e2e5d290e4d2a4f0eb449f510071392e00e10d19",
-                "reference": "e2e5d290e4d2a4f0eb449f510071392e00e10d19",
+                "url": "https://api.github.com/repos/Seldaek/jsonlint/zipball/ff2aa5420bfbc296cf6a0bc785fa5b35736de7c1",
+                "reference": "ff2aa5420bfbc296cf6a0bc785fa5b35736de7c1",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3 || ^7.0"
+                "php": "^5.3 || ^7.0 || ^8.0"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
@@ -7497,7 +8051,17 @@
                 "parser",
                 "validator"
             ],
-            "time": "2019-10-24T14:27:39+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/Seldaek",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/seld/jsonlint",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-04-30T19:05:18+00:00"
         },
         {
             "name": "seld/phar-utils",
@@ -7545,16 +8109,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.5.4",
+            "version": "3.5.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "dceec07328401de6211037abbb18bda423677e26"
+                "reference": "73e2e7f57d958e7228fce50dc0c61f58f017f9f6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/dceec07328401de6211037abbb18bda423677e26",
-                "reference": "dceec07328401de6211037abbb18bda423677e26",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/73e2e7f57d958e7228fce50dc0c61f58f017f9f6",
+                "reference": "73e2e7f57d958e7228fce50dc0c61f58f017f9f6",
                 "shasum": ""
             },
             "require": {
@@ -7592,7 +8156,7 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2020-01-30T22:20:29+00:00"
+            "time": "2020-04-17T01:09:41+00:00"
         },
         {
             "name": "staudenmeir/dusk-updater",
@@ -7643,26 +8207,26 @@
         },
         {
             "name": "symfony/filesystem",
-            "version": "v4.4.7",
+            "version": "v5.0.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "fe297193bf2e6866ed900ed2d5869362768df6a7"
+                "reference": "7cd0dafc4353a0f62e307df90b48466379c8cc91"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/fe297193bf2e6866ed900ed2d5869362768df6a7",
-                "reference": "fe297193bf2e6866ed900ed2d5869362768df6a7",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/7cd0dafc4353a0f62e307df90b48466379c8cc91",
+                "reference": "7cd0dafc4353a0f62e307df90b48466379c8cc91",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
+                "php": "^7.2.5",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.4-dev"
+                    "dev-master": "5.0-dev"
                 }
             },
             "autoload": {
@@ -7703,7 +8267,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-03-27T16:54:36+00:00"
+            "time": "2020-04-12T14:40:17+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -7747,16 +8311,16 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.7.0",
+            "version": "1.8.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "aed98a490f9a8f78468232db345ab9cf606cf598"
+                "reference": "ab2cb0b3b559010b75981b1bdce728da3ee90ad6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/aed98a490f9a8f78468232db345ab9cf606cf598",
-                "reference": "aed98a490f9a8f78468232db345ab9cf606cf598",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/ab2cb0b3b559010b75981b1bdce728da3ee90ad6",
+                "reference": "ab2cb0b3b559010b75981b1bdce728da3ee90ad6",
                 "shasum": ""
             },
             "require": {
@@ -7764,7 +8328,7 @@
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
-                "vimeo/psalm": "<3.6.0"
+                "vimeo/psalm": "<3.9.1"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.8.36 || ^7.5.13"
@@ -7791,7 +8355,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2020-02-14T12:15:55+00:00"
+            "time": "2020-04-18T12:12:48+00:00"
         }
     ],
     "aliases": [],
@@ -7804,7 +8368,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.1.3",
+        "php": "^7.2",
         "ext-curl": "*",
         "ext-gd": "*",
         "ext-json": "*",
diff --git a/config/app.php b/config/app.php
index ac063164a8..84a421694d 100644
--- a/config/app.php
+++ b/config/app.php
@@ -168,6 +168,7 @@ return [
         Illuminate\Session\SessionServiceProvider::class,
         Illuminate\Translation\TranslationServiceProvider::class,
         Illuminate\Validation\ValidationServiceProvider::class,
+        Illuminate\View\ViewServiceProvider::class,
 
         /*
          * Application Service Providers...
@@ -179,7 +180,6 @@ return [
         App\Providers\EventServiceProvider::class,
         App\Providers\RouteServiceProvider::class,
         App\Providers\ComposerServiceProvider::class,
-        App\Providers\ViewServiceProvider::class,
         App\Providers\DatastoreServiceProvider::class,
 
         /*
diff --git a/config/auth.php b/config/auth.php
index 76abc7b4fe..fbea6144dc 100644
--- a/config/auth.php
+++ b/config/auth.php
@@ -105,7 +105,21 @@ return [
             'provider' => 'users',
             'table' => 'password_resets',
             'expire' => 60,
+            'throttle' => 60,
         ],
     ],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Password Confirmation Timeout
+    |--------------------------------------------------------------------------
+    |
+    | Here you may define the amount of seconds before a password confirmation
+    | times out and the user is prompted to re-enter their password via the
+    | confirmation screen. By default, the timeout lasts for three hours.
+    |
+    */
+
+    'password_timeout' => 10800,
+
 ];
diff --git a/config/cache.php b/config/cache.php
index 6614814314..3e8a07cb7a 100644
--- a/config/cache.php
+++ b/config/cache.php
@@ -22,7 +22,8 @@ return [
     | not explicitly specified when executing a given caching function.
     |
     | Supported: "apc", "array", "database", "file",
-    |            "memcached", "redis", "dynamodb"    |
+    |            "memcached", "redis", "dynamodb"
+    |
     */
 
     'default' => env('CACHE_DRIVER', 'array'),
diff --git a/config/database.php b/config/database.php
index a40df3b9f7..d2d65b2104 100644
--- a/config/database.php
+++ b/config/database.php
@@ -159,9 +159,10 @@ return [
 
     'redis' => [
 
-        'client' => env('REDIS_CLIENT', 'predis'),
+        'client' => env('REDIS_CLIENT', 'phpredis'),
+
         'options' => [
-            'cluster' => env('REDIS_CLUSTER', 'predis'),
+            'cluster' => env('REDIS_CLUSTER', 'redis'),
             'prefix' => env('REDIS_PREFIX', Str::slug(env('APP_NAME', 'laravel'), '_').'_database_'),
         ],
 
@@ -169,16 +170,16 @@ return [
             'url' => env('REDIS_URL'),
             'host' => env('REDIS_HOST', '127.0.0.1'),
             'password' => env('REDIS_PASSWORD', null),
-            'port' => env('REDIS_PORT', 6379),
-            'database' => env('REDIS_DB', 0),
+            'port' => env('REDIS_PORT', '6379'),
+            'database' => env('REDIS_DB', '0'),
         ],
 
         'cache' => [
             'url' => env('REDIS_URL'),
             'host' => env('REDIS_HOST', '127.0.0.1'),
             'password' => env('REDIS_PASSWORD', null),
-            'port' => env('REDIS_PORT', 6379),
-            'database' => env('REDIS_CACHE_DB', 1),
+            'port' => env('REDIS_PORT', '6379'),
+            'database' => env('REDIS_CACHE_DB', '1'),
         ],
 
     ],
diff --git a/config/filesystems.php b/config/filesystems.php
index 1712f67874..0c447f0e28 100644
--- a/config/filesystems.php
+++ b/config/filesystems.php
@@ -45,7 +45,7 @@ return [
     | may even configure multiple disks of the same driver. Defaults have
     | been setup for each driver as an example of the required options.
     |
-    | Supported Drivers: "local", "ftp", "sftp", "s3", "rackspace"
+    | Supported Drivers: "local", "ftp", "sftp", "s3"
     |
     */
 
@@ -69,7 +69,7 @@ return [
             'secret' => env('AWS_SECRET_ACCESS_KEY'),
             'region' => env('AWS_DEFAULT_REGION'),
             'bucket' => env('AWS_BUCKET'),
-            'url' => env('AWS_URL'),
+            'endpoint' => env('AWS_URL'),
         ],
 
     ],
diff --git a/config/logging.php b/config/logging.php
index 4c98d4dcac..70e1f9f148 100644
--- a/config/logging.php
+++ b/config/logging.php
@@ -8,6 +8,7 @@
  | request an environment variable to be created upstream or send a pull request.
  */
 
+use Monolog\Handler\NullHandler;
 use Monolog\Handler\StreamHandler;
 use Monolog\Handler\SyslogUdpHandler;
 
@@ -104,6 +105,15 @@ return [
             'driver' => 'errorlog',
             'level' => 'debug',
         ],
+
+        'null' => [
+            'driver' => 'monolog',
+            'handler' => NullHandler::class,
+        ],
+
+        'emergency' => [
+            'path' => storage_path('logs/laravel.log'),
+        ],
     ],
 
 ];
diff --git a/config/mail.php b/config/mail.php
index acb8c11b73..4a2d18a92d 100644
--- a/config/mail.php
+++ b/config/mail.php
@@ -19,8 +19,8 @@ return [
     | sending of e-mail. You may specify which one you're using throughout
     | your application here. By default, Laravel is setup for SMTP mail.
     |
-    | Supported: "smtp", "sendmail", "mailgun", "mandrill", "ses",
-    |            "sparkpost", "postmark", "log", "array"
+    | Supported: "smtp", "sendmail", "mailgun", "ses",
+    |            "postmark", "log", "array"
     |
     */
 
diff --git a/config/queue.php b/config/queue.php
index b566582593..62097ee9ae 100644
--- a/config/queue.php
+++ b/config/queue.php
@@ -7,6 +7,7 @@
  | If there is something you need to change, but is not available as an environment setting,
  | request an environment variable to be created upstream or send a pull request.
  */
+
 return [
 
     /*
@@ -87,6 +88,7 @@ return [
     */
 
     'failed' => [
+        'driver' => env('QUEUE_FAILED_DRIVER', 'database'),
         'database' => env('DB_CONNECTION', 'mysql'),
         'table' => 'failed_jobs',
     ],
diff --git a/config/services.php b/config/services.php
index 32c189e2b1..b1159caacb 100644
--- a/config/services.php
+++ b/config/services.php
@@ -16,9 +16,9 @@ return [
     |--------------------------------------------------------------------------
     |
     | This file is for storing the credentials for third party services such
-    | as Stripe, Mailgun, SparkPost and others. This file provides a sane
-    | default location for this type of information, allowing packages
-    | to have a conventional place to find your various credentials.
+    | as Mailgun, Postmark, AWS and more. This file provides the de facto
+    | location for this type of information, allowing packages to have
+    | a conventional file to locate the various service credentials.
     |
     */
 
@@ -38,18 +38,4 @@ return [
         'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
     ],
 
-    'sparkpost' => [
-        'secret' => env('SPARKPOST_SECRET'),
-    ],
-
-    'stripe' => [
-        'model' => App\User::class,
-        'key' => env('STRIPE_KEY'),
-        'secret' => env('STRIPE_SECRET'),
-        'webhook' => [
-            'secret' => env('STRIPE_WEBHOOK_SECRET'),
-            'tolerance' => env('STRIPE_WEBHOOK_TOLERANCE', 300),
-        ],
-    ],
-
 ];
diff --git a/resources/lang/en/passwords.php b/resources/lang/en/passwords.php
index bf6caf6edc..724de4b9db 100644
--- a/resources/lang/en/passwords.php
+++ b/resources/lang/en/passwords.php
@@ -13,9 +13,9 @@ return [
     |
     */
 
-    'password' => 'Passwords must be at least eight characters and match the confirmation.',
     'reset' => 'Your password has been reset!',
     'sent' => 'We have e-mailed your password reset link!',
+    'throttled' => 'Please wait before retrying.',
     'token' => 'This password reset token is invalid.',
     'user' => "We can't find a user with that e-mail address.",
 
diff --git a/resources/lang/en/validation.php b/resources/lang/en/validation.php
index 7d48f981fa..0274d28621 100644
--- a/resources/lang/en/validation.php
+++ b/resources/lang/en/validation.php
@@ -41,7 +41,7 @@ return [
     'dimensions' => 'The :attribute has invalid image dimensions.',
     'distinct' => 'The :attribute field has a duplicate value.',
     'email' => 'The :attribute must be a valid email address.',
-    'ends_with' => 'The :attribute must end with one of the following: :values',
+    'ends_with' => 'The :attribute must end with one of the following: :values.',
     'exists' => 'The selected :attribute is invalid.',
     'file' => 'The :attribute must be a file.',
     'filled' => 'The :attribute field must have a value.',
@@ -94,6 +94,7 @@ return [
     'not_in' => 'The selected :attribute is invalid.',
     'not_regex' => 'The :attribute format is invalid.',
     'numeric' => 'The :attribute must be a number.',
+    'password' => 'The password is incorrect.',
     'present' => 'The :attribute field must be present.',
     'regex' => 'The :attribute format is invalid.',
     'required' => 'The :attribute field is required.',
@@ -110,7 +111,7 @@ return [
         'string' => 'The :attribute must be :size characters.',
         'array' => 'The :attribute must contain :size items.',
     ],
-    'starts_with' => 'The :attribute must start with one of the following: :values',
+    'starts_with' => 'The :attribute must start with one of the following: :values.',
     'string' => 'The :attribute must be a string.',
     'timezone' => 'The :attribute must be a valid zone.',
     'unique' => 'The :attribute has already been taken.',
diff --git a/tests/data/3com.json b/tests/data/3com.json
index c09cdf411e..caac5bc050 100644
--- a/tests/data/3com.json
+++ b/tests/data/3com.json
@@ -3,18 +3,56 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.43.45.1.6.1.1.1.3.65536",
                     "processor_index": "0",
                     "processor_type": "3com",
-                    "processor_usage": "42",
+                    "processor_usage": 42,
                     "processor_descr": "Processor",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 }
             ]
         },
         "poller": "matches discovery"
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": ".1.3.6.1.4.1.43.10.27.4.1.2.11",
+                    "sysDescr": "3Com SuperStack 3",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "3com",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "3com.png",
+                    "location": null
+                }
+            ]
+        },
+        "poller": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": ".1.3.6.1.4.1.43.10.27.4.1.2.11",
+                    "sysDescr": "3Com SuperStack 3",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": "SuperStack 3 ",
+                    "features": null,
+                    "os": "3com",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "3com.png",
+                    "location": null
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/3com_4200.json b/tests/data/3com_4200.json
index 1ddf991f3a..445dcf3e67 100644
--- a/tests/data/3com_4200.json
+++ b/tests/data/3com_4200.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 15000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 15001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 15004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 15005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 15006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 15007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 15008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 15009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 15512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 15513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 15514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 15515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 15000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 15001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 15004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 15005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 15006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 15007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 15008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 15009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 15512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 15513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 15514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 15515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/acos.json b/tests/data/acos.json
index 6da3814402..acfbf8eb65 100644
--- a/tests/data/acos.json
+++ b/tests/data/acos.json
@@ -3,356 +3,377 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.0",
                     "processor_index": "0",
                     "processor_type": "acos",
-                    "processor_usage": "39",
+                    "processor_usage": 39,
                     "processor_descr": "Proc #0",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.1",
                     "processor_index": "1",
                     "processor_type": "acos",
-                    "processor_usage": "14",
+                    "processor_usage": 14,
                     "processor_descr": "Proc #1",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.2",
                     "processor_index": "2",
                     "processor_type": "acos",
-                    "processor_usage": "19",
+                    "processor_usage": 19,
                     "processor_descr": "Proc #2",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.3",
                     "processor_index": "3",
                     "processor_type": "acos",
-                    "processor_usage": "14",
+                    "processor_usage": 14,
                     "processor_descr": "Proc #3",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.4",
                     "processor_index": "4",
                     "processor_type": "acos",
-                    "processor_usage": "17",
+                    "processor_usage": 17,
                     "processor_descr": "Proc #4",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.5",
                     "processor_index": "5",
                     "processor_type": "acos",
-                    "processor_usage": "18",
+                    "processor_usage": 18,
                     "processor_descr": "Proc #5",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.6",
                     "processor_index": "6",
                     "processor_type": "acos",
-                    "processor_usage": "22",
+                    "processor_usage": 22,
                     "processor_descr": "Proc #6",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.7",
                     "processor_index": "7",
                     "processor_type": "acos",
-                    "processor_usage": "18",
+                    "processor_usage": 18,
                     "processor_descr": "Proc #7",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.8",
                     "processor_index": "8",
                     "processor_type": "acos",
-                    "processor_usage": "17",
+                    "processor_usage": 17,
                     "processor_descr": "Proc #8",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.9",
                     "processor_index": "9",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #9",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.10",
                     "processor_index": "10",
                     "processor_type": "acos",
-                    "processor_usage": "23",
+                    "processor_usage": 23,
                     "processor_descr": "Proc #10",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.11",
                     "processor_index": "11",
                     "processor_type": "acos",
-                    "processor_usage": "10",
+                    "processor_usage": 10,
                     "processor_descr": "Proc #11",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.12",
                     "processor_index": "12",
                     "processor_type": "acos",
-                    "processor_usage": "21",
+                    "processor_usage": 21,
                     "processor_descr": "Proc #12",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.13",
                     "processor_index": "13",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #13",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.14",
                     "processor_index": "14",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #14",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.15",
                     "processor_index": "15",
                     "processor_type": "acos",
-                    "processor_usage": "10",
+                    "processor_usage": 10,
                     "processor_descr": "Proc #15",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.16",
                     "processor_index": "16",
                     "processor_type": "acos",
-                    "processor_usage": "19",
+                    "processor_usage": 19,
                     "processor_descr": "Proc #16",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.17",
                     "processor_index": "17",
                     "processor_type": "acos",
-                    "processor_usage": "22",
+                    "processor_usage": 22,
                     "processor_descr": "Proc #17",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.18",
                     "processor_index": "18",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #18",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.19",
                     "processor_index": "19",
                     "processor_type": "acos",
-                    "processor_usage": "28",
+                    "processor_usage": 28,
                     "processor_descr": "Proc #19",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.20",
                     "processor_index": "20",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #20",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.21",
                     "processor_index": "21",
                     "processor_type": "acos",
-                    "processor_usage": "22",
+                    "processor_usage": 22,
                     "processor_descr": "Proc #21",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.22",
                     "processor_index": "22",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #22",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.23",
                     "processor_index": "23",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #23",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
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+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.24",
                     "processor_index": "24",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #24",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.25",
                     "processor_index": "25",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #25",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.26",
                     "processor_index": "26",
                     "processor_type": "acos",
-                    "processor_usage": "22",
+                    "processor_usage": 22,
                     "processor_descr": "Proc #26",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.27",
                     "processor_index": "27",
                     "processor_type": "acos",
-                    "processor_usage": "18",
+                    "processor_usage": 18,
                     "processor_descr": "Proc #27",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.28",
                     "processor_index": "28",
                     "processor_type": "acos",
-                    "processor_usage": "16",
+                    "processor_usage": 16,
                     "processor_descr": "Proc #28",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.29",
                     "processor_index": "29",
                     "processor_type": "acos",
-                    "processor_usage": "14",
+                    "processor_usage": 14,
                     "processor_descr": "Proc #29",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.30",
                     "processor_index": "30",
                     "processor_type": "acos",
-                    "processor_usage": "22",
+                    "processor_usage": 22,
                     "processor_descr": "Proc #30",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 },
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22610.2.4.1.3.2.1.3.31",
                     "processor_index": "31",
                     "processor_type": "acos",
-                    "processor_usage": "20",
+                    "processor_usage": 20,
                     "processor_descr": "Proc #31",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
+                }
+            ]
+        },
+        "poller": "matches discovery"
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": ".1.3.6.1.4.1.22610.1.3.28",
+                    "sysDescr": "Thunder Series Unified Application Service Gateway TH5630, ACOS 4.1.0-P5,",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "acos",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "a10.png",
+                    "location": null
                 }
             ]
         },
diff --git a/tests/data/adtran-aos.json b/tests/data/adtran-aos.json
index eafdffa26c..991e04fa08 100644
--- a/tests/data/adtran-aos.json
+++ b/tests/data/adtran-aos.json
@@ -3,15 +3,36 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.664.5.53.1.4.1.0",
                     "processor_index": "0",
                     "processor_type": "adtran-aos",
-                    "processor_usage": "42",
+                    "processor_usage": 42,
                     "processor_descr": "Processor",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
+                }
+            ]
+        },
+        "poller": "matches discovery"
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": null,
+                    "sysDescr": "NetVanta",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "adtran-aos",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "adtran.png",
+                    "location": null
                 }
             ]
         },
diff --git a/tests/data/adva_fsp150_ge112.json b/tests/data/adva_fsp150_ge112.json
index 139700ea21..5ad28cd9ee 100644
--- a/tests/data/adva_fsp150_ge112.json
+++ b/tests/data/adva_fsp150_ge112.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aen.json b/tests/data/aen.json
index 5ef5cb758d..0b4d4d27f6 100644
--- a/tests/data/aen.json
+++ b/tests/data/aen.json
@@ -3,15 +3,36 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.22420.1.1.20.0",
                     "processor_index": "0",
                     "processor_type": "aen",
-                    "processor_usage": "42",
+                    "processor_usage": 42,
                     "processor_descr": "Processor",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
+                }
+            ]
+        },
+        "poller": "matches discovery"
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": null,
+                    "sysDescr": "AMN-",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "aen",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "accedian.png",
+                    "location": null
                 }
             ]
         },
diff --git a/tests/data/airos-af.json b/tests/data/airos-af.json
index d76aaee0f9..61006b0ac1 100644
--- a/tests/data/airos-af.json
+++ b/tests/data/airos-af.json
@@ -397,9 +397,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -489,9 +491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -504,9 +504,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -596,9 +598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -611,9 +611,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -703,9 +705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -718,9 +718,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -810,9 +812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -825,9 +825,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -917,9 +919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -932,9 +932,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1024,9 +1026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1039,9 +1039,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1131,9 +1133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1150,9 +1150,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1242,9 +1244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1257,9 +1257,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1349,9 +1351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1364,9 +1364,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1456,9 +1458,7 @@
                     "ifOutMulticastPkts": 3064204,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1471,9 +1471,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1563,9 +1565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1578,9 +1578,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1670,9 +1672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1685,9 +1685,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1777,9 +1779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1792,9 +1792,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1884,9 +1886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/airos.json b/tests/data/airos.json
index c97bfb16fb..2ce84343ef 100644
--- a/tests/data/airos.json
+++ b/tests/data/airos.json
@@ -601,15 +601,15 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.41112.1.4.8.3.0",
                     "processor_index": "0",
                     "processor_type": "airos",
-                    "processor_usage": "4",
+                    "processor_usage": 4,
                     "processor_descr": "Processor",
-                    "processor_precision": "100",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 100,
+                    "processor_perc_warn": 75
                 }
             ]
         },
@@ -709,13 +709,13 @@
                     "sysDescr": "Linux 2.6.32.68 #1 Fri Dec 16 15:44:21 EET 2016 mips",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "airos",
                     "type": "wireless",
                     "serial": null,
-                    "icon": "ubiquiti.svg"
+                    "icon": "ubiquiti.svg",
+                    "location": null
                 }
             ]
         },
@@ -729,11 +729,11 @@
                     "version": null,
                     "hardware": "Ubiquiti Linux 2.6.32.68 #1 Fri Dec 16 15:44:21 EET 2016 mips",
                     "features": null,
-                    "location": "<private>",
                     "os": "airos",
                     "type": "wireless",
                     "serial": null,
-                    "icon": "ubiquiti.svg"
+                    "icon": "ubiquiti.svg",
+                    "location": "<private>"
                 }
             ]
         }
diff --git a/tests/data/aix.json b/tests/data/aix.json
index 15ba4c5831..531ada57a8 100644
--- a/tests/data/aix.json
+++ b/tests/data/aix.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aix_std.json b/tests/data/aix_std.json
index aeaee5ae5c..3414eecdc1 100644
--- a/tests/data/aix_std.json
+++ b/tests/data/aix_std.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/akcp_serverprobe8.json b/tests/data/akcp_serverprobe8.json
index 6c31eae253..7f6623d139 100644
--- a/tests/data/akcp_serverprobe8.json
+++ b/tests/data/akcp_serverprobe8.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/alfo80hd.json b/tests/data/alfo80hd.json
index 7a1c8630da..e105168fcc 100644
--- a/tests/data/alfo80hd.json
+++ b/tests/data/alfo80hd.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 107912717,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 14906971,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/allied-tq.json b/tests/data/allied-tq.json
index 62e33061ee..2d981488cb 100644
--- a/tests/data/allied-tq.json
+++ b/tests/data/allied-tq.json
@@ -8,13 +8,13 @@
                     "sysDescr": "AT-TQ4600 version 4.0.1.07",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "allied-tq",
                     "type": "wireless",
                     "serial": null,
-                    "icon": "alliedtelesis.svg"
+                    "icon": "alliedtelesis.svg",
+                    "location": null
                 }
             ]
         },
@@ -28,11 +28,11 @@
                     "version": "4.0.1.07",
                     "hardware": "AT-TQ4600",
                     "features": null,
-                    "location": "<private>",
                     "os": "allied-tq",
                     "type": "wireless",
                     "serial": null,
-                    "icon": "alliedtelesis.svg"
+                    "icon": "alliedtelesis.svg",
+                    "location": "<private>"
                 }
             ]
         }
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/allied_alliedware.json b/tests/data/allied_alliedware.json
index d32792be9c..24d2875530 100644
--- a/tests/data/allied_alliedware.json
+++ b/tests/data/allied_alliedware.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/allied_awplusv2.json b/tests/data/allied_awplusv2.json
index d407481dc6..4efd3d48ad 100644
--- a/tests/data/allied_awplusv2.json
+++ b/tests/data/allied_awplusv2.json
@@ -31,9 +31,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -123,9 +125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -138,9 +138,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -230,9 +232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -245,9 +245,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -337,9 +339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -352,9 +352,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -444,9 +446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -459,9 +459,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -551,9 +553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -566,9 +566,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -658,9 +660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -673,9 +673,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -765,9 +767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -780,9 +780,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -872,9 +874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -887,9 +887,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -979,9 +981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -994,9 +994,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1086,9 +1088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1101,9 +1101,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1193,9 +1195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1208,9 +1208,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1300,9 +1302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1315,9 +1315,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1407,9 +1409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1422,9 +1422,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1514,9 +1516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1529,9 +1529,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1621,9 +1623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1636,9 +1636,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1728,9 +1730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1743,9 +1743,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1835,9 +1837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1850,9 +1850,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1942,9 +1944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1957,9 +1957,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2049,9 +2051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2064,9 +2064,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2156,9 +2158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2171,9 +2171,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2263,9 +2265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2278,9 +2278,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2370,9 +2372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2385,9 +2385,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2477,9 +2479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2492,9 +2492,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2584,9 +2586,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2599,9 +2599,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2691,9 +2693,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2706,9 +2706,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2798,9 +2800,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2813,9 +2813,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2905,9 +2907,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2920,9 +2920,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3012,9 +3014,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3027,9 +3027,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3119,9 +3121,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3134,9 +3134,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3226,9 +3228,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3241,9 +3241,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3333,9 +3335,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3348,9 +3348,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3440,9 +3442,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3455,9 +3455,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3547,9 +3549,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3562,9 +3562,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3654,9 +3656,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3669,9 +3669,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3761,9 +3763,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3776,9 +3776,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3868,9 +3870,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3883,9 +3883,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3975,9 +3977,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3990,9 +3990,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4082,9 +4084,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4097,9 +4097,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4189,9 +4191,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4204,9 +4204,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4296,9 +4298,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4311,9 +4311,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4403,9 +4405,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4418,9 +4418,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4510,9 +4512,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4525,9 +4525,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4617,9 +4619,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4632,9 +4632,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4724,9 +4726,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4739,9 +4739,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4831,9 +4833,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4846,9 +4846,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4938,9 +4940,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4953,9 +4953,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5045,9 +5047,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5060,9 +5060,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5152,9 +5154,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5167,9 +5167,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5259,9 +5261,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5274,9 +5274,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5366,9 +5368,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5383,13 +5383,13 @@
                     "sysDescr": "AlliedWare Plus (TM) 2.2.3.0",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "allied",
                     "type": "network",
                     "serial": null,
-                    "icon": "alliedtelesis.svg"
+                    "icon": "alliedtelesis.svg",
+                    "location": null
                 }
             ]
         },
diff --git a/tests/data/allied_websmart.json b/tests/data/allied_websmart.json
index 4dcab8cc68..565bc35144 100644
--- a/tests/data/allied_websmart.json
+++ b/tests/data/allied_websmart.json
@@ -19,9 +19,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -111,9 +113,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -126,9 +126,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -218,9 +220,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -233,9 +233,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -325,9 +327,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -340,9 +340,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -432,9 +434,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -447,9 +447,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -539,9 +541,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -554,9 +554,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -646,9 +648,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -661,9 +661,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -753,9 +755,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -768,9 +768,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -860,9 +862,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -875,9 +875,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -967,9 +969,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -982,9 +982,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1074,9 +1076,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1089,9 +1089,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1181,9 +1183,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1196,9 +1196,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1288,9 +1290,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1303,9 +1303,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1395,9 +1397,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1410,9 +1410,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1502,9 +1504,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1517,9 +1517,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1609,9 +1611,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1624,9 +1624,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1716,9 +1718,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1731,9 +1731,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1823,9 +1825,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1838,9 +1838,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1930,9 +1932,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1945,9 +1945,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2037,9 +2039,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2052,9 +2052,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2144,9 +2146,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2159,9 +2159,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2251,9 +2253,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2266,9 +2266,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2358,9 +2360,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2373,9 +2373,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2465,9 +2467,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2480,9 +2480,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2572,9 +2574,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2591,9 +2591,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2683,9 +2685,7 @@
                     "ifOutMulticastPkts": 2153557,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2698,9 +2698,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2790,9 +2792,7 @@
                     "ifOutMulticastPkts": 631171,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2805,9 +2805,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2897,9 +2899,7 @@
                     "ifOutMulticastPkts": 2153455,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2912,9 +2912,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3004,9 +3006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3019,9 +3019,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3111,9 +3113,7 @@
                     "ifOutMulticastPkts": 1867343,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3126,9 +3126,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3218,9 +3220,7 @@
                     "ifOutMulticastPkts": 2153543,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3233,9 +3233,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3325,9 +3327,7 @@
                     "ifOutMulticastPkts": 743810,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3340,9 +3340,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3432,9 +3434,7 @@
                     "ifOutMulticastPkts": 2004862,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3447,9 +3447,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3539,9 +3541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3554,9 +3554,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3646,9 +3648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3661,9 +3661,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3753,9 +3755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3768,9 +3768,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3860,9 +3862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3875,9 +3875,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3967,9 +3969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3982,9 +3982,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4074,9 +4076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4089,9 +4089,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4181,9 +4183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4196,9 +4196,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4288,9 +4290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4303,9 +4303,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4395,9 +4397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4410,9 +4410,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4502,9 +4504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4517,9 +4517,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4609,9 +4611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4624,9 +4624,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4716,9 +4718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4731,9 +4731,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4823,9 +4825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4838,9 +4838,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4930,9 +4932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4945,9 +4945,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5037,9 +5039,7 @@
                     "ifOutMulticastPkts": 79172,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5052,9 +5052,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5144,9 +5146,7 @@
                     "ifOutMulticastPkts": 387,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -5160,13 +5160,13 @@
                     "sysDescr": "AT-GS950/24 Gigabit Ethernet WebSmart Switch",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "allied",
                     "type": "network",
                     "serial": null,
-                    "icon": "alliedtelesis.svg"
+                    "icon": "alliedtelesis.svg",
+                    "location": null
                 }
             ]
         },
@@ -5180,11 +5180,11 @@
                     "version": "WebSmart 1.00.043",
                     "hardware": "AT-GS950/24",
                     "features": null,
-                    "location": "<private>",
                     "os": "allied",
                     "type": "network",
                     "serial": null,
-                    "icon": "alliedtelesis.svg"
+                    "icon": "alliedtelesis.svg",
+                    "location": "<private>"
                 }
             ]
         }
@@ -5194,5 +5194,26 @@
             "processors": []
         },
         "poller": "matches discovery"
+    },
+    "vlans": {
+        "discovery": {
+            "vlans": [
+                {
+                    "vlan_vlan": 1,
+                    "vlan_domain": 1,
+                    "vlan_name": "DefaultVLAN",
+                    "vlan_type": null,
+                    "vlan_mtu": null
+                },
+                {
+                    "vlan_vlan": 4001,
+                    "vlan_domain": 1,
+                    "vlan_name": "",
+                    "vlan_type": null,
+                    "vlan_mtu": null
+                }
+            ],
+            "ports_vlans": []
+        }
     }
 }
diff --git a/tests/data/allworx_voip.json b/tests/data/allworx_voip.json
index b0799b6709..a34732f953 100644
--- a/tests/data/allworx_voip.json
+++ b/tests/data/allworx_voip.json
@@ -10,11 +10,11 @@
                     "version": null,
                     "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "allworx_voip",
                     "type": "appliance",
                     "serial": null,
-                    "icon": "allworx.svg"
+                    "icon": "allworx.svg",
+                    "location": null
                 }
             ]
         },
@@ -28,11 +28,11 @@
                     "version": "8.3.5.4",
                     "hardware": "Allworx Connect 731",
                     "features": null,
-                    "location": "<private>",
                     "os": "allworx_voip",
                     "type": "appliance",
                     "serial": "<private>",
-                    "icon": "allworx.svg"
+                    "icon": "allworx.svg",
+                    "location": "<private>"
                 }
             ]
         }
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan port ",
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/alteonos.json b/tests/data/alteonos.json
index 9cc2a6659f..8a01fce215 100644
--- a/tests/data/alteonos.json
+++ b/tests/data/alteonos.json
@@ -3,18 +3,56 @@
         "discovery": {
             "processors": [
                 {
-                    "entPhysicalIndex": "0",
-                    "hrDeviceIndex": "0",
+                    "entPhysicalIndex": 0,
+                    "hrDeviceIndex": 0,
                     "processor_oid": ".1.3.6.1.4.1.1872.2.5.1.2.2.1.0",
                     "processor_index": "0",
                     "processor_type": "alteonos",
-                    "processor_usage": "42",
+                    "processor_usage": 42,
                     "processor_descr": "Processor",
-                    "processor_precision": "1",
-                    "processor_perc_warn": "75"
+                    "processor_precision": 1,
+                    "processor_perc_warn": 75
                 }
             ]
         },
         "poller": "matches discovery"
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": ".1.3.6.1.4.1.1872.1.13.3.5.1",
+                    "sysDescr": "Alteon Application Switch 5224XL",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "alteonos",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "radware.svg",
+                    "location": null
+                }
+            ]
+        },
+        "poller": {
+            "devices": [
+                {
+                    "sysName": "",
+                    "sysObjectID": ".1.3.6.1.4.1.1872.1.13.3.5.1",
+                    "sysDescr": "Alteon Application Switch 5224XL",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": " Vers. ",
+                    "features": "Ver. ",
+                    "os": "alteonos",
+                    "type": "network",
+                    "serial": null,
+                    "icon": "radware.svg",
+                    "location": null
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/anue.json b/tests/data/anue.json
index 1b03d73a34..7b8e8db516 100644
--- a/tests/data/anue.json
+++ b/tests/data/anue.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 998,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 999,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 9001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 9002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 9003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 9004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 9005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 9006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 400001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 400002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 400003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 400004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 400005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 400006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 400007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 400008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 400009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 400010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 400011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 400012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 400013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 400014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 400015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 400016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 400017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 400018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 400019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 400020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 400021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 400022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 400023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 400024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 400025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 400026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 400027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 400028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 400029,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 400030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 400031,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 400032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 400033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 400034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 400035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 400036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 400037,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 400038,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 400039,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 400040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 400041,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 400042,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 400043,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 400044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 400045,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 400046,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 400047,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 400048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 500001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 500002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 500003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 500004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 501001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 501002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 501003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 501004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 501005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 501006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 501007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 501008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 501009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 501010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 501011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 501012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 501013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 501014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 501015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 501016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 502001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 502002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
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                     "ifOperStatus": "up",
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@@ -8382,9 +8384,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 502003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8489,9 +8491,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 502004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8596,9 +8598,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 502005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 502006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 502007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8917,9 +8919,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 502008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 502009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 502010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 502011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9345,9 +9347,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 502012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 502013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9559,9 +9561,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 502014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9666,9 +9668,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 502015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 502016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 600001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 600002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 600003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 600004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 600005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 600006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 600007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 600008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 600009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 600010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 600011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 600012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 600013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 600014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 600015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 600016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 600017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 600018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 600019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 600020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 600021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 600022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 600023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 600024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 600025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 600026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 600027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 600028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 600029,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 600030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 600031,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 600032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 600033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 600034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 600035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 600036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 600037,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 600038,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 600039,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 600040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 600041,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 600042,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 600043,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 600044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 600045,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 600046,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 600047,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 600048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 700001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 700002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 700003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 700004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15459,9 +15459,11 @@
                     "portName": null,
                     "ifIndex": 700005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15551,9 +15553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15566,9 +15566,11 @@
                     "portName": null,
                     "ifIndex": 700006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15658,9 +15660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
                     "ifIndex": 700007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15765,9 +15767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15780,9 +15780,11 @@
                     "portName": null,
                     "ifIndex": 700008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15872,9 +15874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15887,9 +15887,11 @@
                     "portName": null,
                     "ifIndex": 700009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15979,9 +15981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15994,9 +15994,11 @@
                     "portName": null,
                     "ifIndex": 700010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16086,9 +16088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16101,9 +16101,11 @@
                     "portName": null,
                     "ifIndex": 700011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16193,9 +16195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16208,9 +16208,11 @@
                     "portName": null,
                     "ifIndex": 700012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16300,9 +16302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16315,9 +16315,11 @@
                     "portName": null,
                     "ifIndex": 700013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16407,9 +16409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 700014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16514,9 +16516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16529,9 +16529,11 @@
                     "portName": null,
                     "ifIndex": 700015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16621,9 +16623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16636,9 +16636,11 @@
                     "portName": null,
                     "ifIndex": 700016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16728,9 +16730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16743,9 +16743,11 @@
                     "portName": null,
                     "ifIndex": 700017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16835,9 +16837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
                     "ifIndex": 700018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16942,9 +16944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
                     "ifIndex": 700019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17049,9 +17051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
                     "ifIndex": 700020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17156,9 +17158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
                     "ifIndex": 700021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17263,9 +17265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
                     "ifIndex": 700022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17370,9 +17372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17385,9 +17385,11 @@
                     "portName": null,
                     "ifIndex": 700023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17477,9 +17479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17492,9 +17492,11 @@
                     "portName": null,
                     "ifIndex": 700024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17584,9 +17586,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17599,9 +17599,11 @@
                     "portName": null,
                     "ifIndex": 700025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17691,9 +17693,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17706,9 +17706,11 @@
                     "portName": null,
                     "ifIndex": 700026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17798,9 +17800,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -17813,9 +17813,11 @@
                     "portName": null,
                     "ifIndex": 700027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -17905,9 +17907,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -17920,9 +17920,11 @@
                     "portName": null,
                     "ifIndex": 700028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18012,9 +18014,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18027,9 +18027,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18119,9 +18121,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18134,9 +18134,11 @@
                     "portName": null,
                     "ifIndex": 700030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18226,9 +18228,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18241,9 +18241,11 @@
                     "portName": null,
                     "ifIndex": 700031,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18333,9 +18335,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18348,9 +18348,11 @@
                     "portName": null,
                     "ifIndex": 700032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18440,9 +18442,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18455,9 +18455,11 @@
                     "portName": null,
                     "ifIndex": 700033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18547,9 +18549,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18562,9 +18562,11 @@
                     "portName": null,
                     "ifIndex": 700034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18654,9 +18656,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -18669,9 +18669,11 @@
                     "portName": null,
                     "ifIndex": 700035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18761,9 +18763,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18776,9 +18776,11 @@
                     "portName": null,
                     "ifIndex": 700036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18868,9 +18870,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -18883,9 +18883,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18975,9 +18977,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18990,9 +18990,11 @@
                     "portName": null,
                     "ifIndex": 700038,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -19082,9 +19084,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -19097,9 +19097,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19189,9 +19191,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19204,9 +19204,11 @@
                     "portName": null,
                     "ifIndex": 700040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -19296,9 +19298,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19311,9 +19311,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -19403,9 +19405,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19418,9 +19418,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19510,9 +19512,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19525,9 +19525,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -19617,9 +19619,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19632,9 +19632,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19724,9 +19726,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19739,9 +19739,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -19831,9 +19833,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19846,9 +19846,11 @@
                     "portName": null,
                     "ifIndex": 700046,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19938,9 +19940,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19953,9 +19953,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20045,9 +20047,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20060,9 +20060,11 @@
                     "portName": null,
                     "ifIndex": 700048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20152,9 +20154,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20167,9 +20167,11 @@
                     "portName": null,
                     "ifIndex": 900001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20259,9 +20261,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20274,9 +20274,11 @@
                     "portName": null,
                     "ifIndex": 900002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -20366,9 +20368,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20381,9 +20381,11 @@
                     "portName": null,
                     "ifIndex": 900003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -20473,9 +20475,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20488,9 +20488,11 @@
                     "portName": null,
                     "ifIndex": 900004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20580,9 +20582,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20595,9 +20595,11 @@
                     "portName": null,
                     "ifIndex": 900005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20687,9 +20689,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20702,9 +20702,11 @@
                     "portName": null,
                     "ifIndex": 900006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20794,9 +20796,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20809,9 +20809,11 @@
                     "portName": null,
                     "ifIndex": 900007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20901,9 +20903,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20916,9 +20916,11 @@
                     "portName": null,
                     "ifIndex": 900008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21008,9 +21010,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21023,9 +21023,11 @@
                     "portName": null,
                     "ifIndex": 900009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21115,9 +21117,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21130,9 +21130,11 @@
                     "portName": null,
                     "ifIndex": 900010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21222,9 +21224,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21237,9 +21237,11 @@
                     "portName": null,
                     "ifIndex": 900011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21329,9 +21331,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21344,9 +21344,11 @@
                     "portName": null,
                     "ifIndex": 900012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21436,9 +21438,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21451,9 +21451,11 @@
                     "portName": null,
                     "ifIndex": 900013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21543,9 +21545,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21558,9 +21558,11 @@
                     "portName": null,
                     "ifIndex": 900014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21650,9 +21652,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21665,9 +21665,11 @@
                     "portName": null,
                     "ifIndex": 900015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21757,9 +21759,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21772,9 +21772,11 @@
                     "portName": null,
                     "ifIndex": 900016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21864,9 +21866,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21879,9 +21879,11 @@
                     "portName": null,
                     "ifIndex": 900017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21971,9 +21973,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21986,9 +21986,11 @@
                     "portName": null,
                     "ifIndex": 900018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22078,9 +22080,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22093,9 +22093,11 @@
                     "portName": null,
                     "ifIndex": 900019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22185,9 +22187,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22200,9 +22200,11 @@
                     "portName": null,
                     "ifIndex": 900020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22292,9 +22294,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22307,9 +22307,11 @@
                     "portName": null,
                     "ifIndex": 900021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22399,9 +22401,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22414,9 +22414,11 @@
                     "portName": null,
                     "ifIndex": 900022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22506,9 +22508,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22521,9 +22521,11 @@
                     "portName": null,
                     "ifIndex": 900023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22613,9 +22615,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22628,9 +22628,11 @@
                     "portName": null,
                     "ifIndex": 900024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22720,9 +22722,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22735,9 +22735,11 @@
                     "portName": null,
                     "ifIndex": 900025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22827,9 +22829,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22842,9 +22842,11 @@
                     "portName": null,
                     "ifIndex": 900026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22934,9 +22936,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22949,9 +22949,11 @@
                     "portName": null,
                     "ifIndex": 900027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23041,9 +23043,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23056,9 +23056,11 @@
                     "portName": null,
                     "ifIndex": 900028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23148,9 +23150,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23163,9 +23163,11 @@
                     "portName": null,
                     "ifIndex": 900029,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23255,9 +23257,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23270,9 +23270,11 @@
                     "portName": null,
                     "ifIndex": 900030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23362,9 +23364,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23377,9 +23377,11 @@
                     "portName": null,
                     "ifIndex": 900031,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23469,9 +23471,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23484,9 +23484,11 @@
                     "portName": null,
                     "ifIndex": 900032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23576,9 +23578,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23591,9 +23591,11 @@
                     "portName": null,
                     "ifIndex": 900033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23683,9 +23685,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23698,9 +23698,11 @@
                     "portName": null,
                     "ifIndex": 900034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23790,9 +23792,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23805,9 +23805,11 @@
                     "portName": null,
                     "ifIndex": 900035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23897,9 +23899,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23912,9 +23912,11 @@
                     "portName": null,
                     "ifIndex": 900036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24004,9 +24006,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24019,9 +24019,11 @@
                     "portName": null,
                     "ifIndex": 900037,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24111,9 +24113,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24126,9 +24126,11 @@
                     "portName": null,
                     "ifIndex": 900038,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24218,9 +24220,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24233,9 +24233,11 @@
                     "portName": null,
                     "ifIndex": 900039,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24325,9 +24327,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24340,9 +24340,11 @@
                     "portName": null,
                     "ifIndex": 900040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24432,9 +24434,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24447,9 +24447,11 @@
                     "portName": null,
                     "ifIndex": 900041,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24539,9 +24541,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24554,9 +24554,11 @@
                     "portName": null,
                     "ifIndex": 900042,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24646,9 +24648,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24661,9 +24661,11 @@
                     "portName": null,
                     "ifIndex": 900043,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24753,9 +24755,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24768,9 +24768,11 @@
                     "portName": null,
                     "ifIndex": 900044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24860,9 +24862,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24875,9 +24875,11 @@
                     "portName": null,
                     "ifIndex": 900045,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24967,9 +24969,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24982,9 +24982,11 @@
                     "portName": null,
                     "ifIndex": 900046,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25074,9 +25076,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25089,9 +25089,11 @@
                     "portName": null,
                     "ifIndex": 900047,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25181,9 +25183,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25196,9 +25196,11 @@
                     "portName": null,
                     "ifIndex": 900048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25288,9 +25290,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 998,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 23,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 999,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 9001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 9002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 9003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 9004,
                     "ifSpeed": 320000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 320000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 4594131395,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 9005,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 3654978848,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 9006,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 96,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 400001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 400002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r422-hl02 ",
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 400003,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 400004,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 400005,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 400006,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 400007,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 400008,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 400009,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 400010,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 400011,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 400012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 400013,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 400014,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 400015,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 400016,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 400017,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 400018,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 400019,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 400020,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 400021,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 400022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 400023,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 400024,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 400025,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 400026,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 400027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 400028,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-vbs-r122  ",
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 400029,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 400030,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 400031,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 400032,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r305-bl01 ",
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 400033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r306-bl02 ",
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 400034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r416-hl01 ",
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 400035,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r416-hl02 ",
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 400036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r417-hl01 ",
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 400037,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r417-hl02 ",
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 400038,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r418-hl01 ",
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 400039,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r418-hl02 ",
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 400040,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r419-hl01 ",
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 400041,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r419-hl02 ",
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 400042,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r420-hl01 ",
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 400043,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r420-hl02 ",
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 400044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r421-hl01 ",
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 400045,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r421-hl02 ",
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 400046,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r422-hl01 ",
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 400047,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 400048,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 96,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 500001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 500002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 500003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 500004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-01 ",
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 501001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 338735670,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-02 ",
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 501002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 400814131,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-03 ",
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 501003,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 328060801,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-04 ",
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 501004,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 330777113,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-05 ",
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 501005,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 320814689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-06 ",
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 501006,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 330093402,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-07 ",
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 501007,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 381845740,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-08 ",
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 501008,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 419117938,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-09 ",
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 501009,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 465527721,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ghost_p6-10 ",
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 501010,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 339191643,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 501011,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 501012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 501013,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 501014,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 501015,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 501016,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 502001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 502002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 502003,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 502004,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 502005,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 502006,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 502007,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 502008,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 502009,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 502010,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 502011,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 502012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 502013,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 502014,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34937,9 +34937,11 @@
                     "portName": null,
                     "ifIndex": 502015,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35029,9 +35031,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35044,9 +35044,11 @@
                     "portName": null,
                     "ifIndex": 502016,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35136,9 +35138,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35151,9 +35151,11 @@
                     "portName": null,
                     "ifIndex": 600001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35243,9 +35245,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35258,9 +35258,11 @@
                     "portName": null,
                     "ifIndex": 600002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35350,9 +35352,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35365,9 +35365,11 @@
                     "portName": null,
                     "ifIndex": 600003,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35457,9 +35459,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35472,9 +35472,11 @@
                     "portName": null,
                     "ifIndex": 600004,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35564,9 +35566,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35579,9 +35579,11 @@
                     "portName": null,
                     "ifIndex": 600005,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35671,9 +35673,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35686,9 +35686,11 @@
                     "portName": null,
                     "ifIndex": 600006,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35778,9 +35780,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35793,9 +35793,11 @@
                     "portName": null,
                     "ifIndex": 600007,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35885,9 +35887,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35900,9 +35900,11 @@
                     "portName": null,
                     "ifIndex": 600008,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35992,9 +35994,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36007,9 +36007,11 @@
                     "portName": null,
                     "ifIndex": 600009,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36099,9 +36101,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36114,9 +36114,11 @@
                     "portName": null,
                     "ifIndex": 600010,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36206,9 +36208,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36221,9 +36221,11 @@
                     "portName": null,
                     "ifIndex": 600011,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36313,9 +36315,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36328,9 +36328,11 @@
                     "portName": null,
                     "ifIndex": 600012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36420,9 +36422,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36435,9 +36435,11 @@
                     "portName": null,
                     "ifIndex": 600013,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36527,9 +36529,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36542,9 +36542,11 @@
                     "portName": null,
                     "ifIndex": 600014,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36634,9 +36636,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36649,9 +36649,11 @@
                     "portName": null,
                     "ifIndex": 600015,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36741,9 +36743,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36756,9 +36756,11 @@
                     "portName": null,
                     "ifIndex": 600016,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36848,9 +36850,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36863,9 +36863,11 @@
                     "portName": null,
                     "ifIndex": 600017,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36955,9 +36957,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36970,9 +36970,11 @@
                     "portName": null,
                     "ifIndex": 600018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37062,9 +37064,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37077,9 +37077,11 @@
                     "portName": null,
                     "ifIndex": 600019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37169,9 +37171,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37184,9 +37184,11 @@
                     "portName": null,
                     "ifIndex": 600020,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37276,9 +37278,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37291,9 +37291,11 @@
                     "portName": null,
                     "ifIndex": 600021,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37383,9 +37385,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37398,9 +37398,11 @@
                     "portName": null,
                     "ifIndex": 600022,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37490,9 +37492,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37505,9 +37505,11 @@
                     "portName": null,
                     "ifIndex": 600023,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37597,9 +37599,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37612,9 +37612,11 @@
                     "portName": null,
                     "ifIndex": 600024,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37704,9 +37706,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37719,9 +37719,11 @@
                     "portName": null,
                     "ifIndex": 600025,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37811,9 +37813,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37826,9 +37826,11 @@
                     "portName": null,
                     "ifIndex": 600026,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37918,9 +37920,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37933,9 +37933,11 @@
                     "portName": null,
                     "ifIndex": 600027,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38025,9 +38027,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38040,9 +38040,11 @@
                     "portName": null,
                     "ifIndex": 600028,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38132,9 +38134,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38147,9 +38147,11 @@
                     "portName": null,
                     "ifIndex": 600029,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38239,9 +38241,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38254,9 +38254,11 @@
                     "portName": null,
                     "ifIndex": 600030,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38346,9 +38348,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38361,9 +38361,11 @@
                     "portName": null,
                     "ifIndex": 600031,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38453,9 +38455,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38468,9 +38468,11 @@
                     "portName": null,
                     "ifIndex": 600032,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38560,9 +38562,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38575,9 +38575,11 @@
                     "portName": null,
                     "ifIndex": 600033,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38667,9 +38669,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38682,9 +38682,11 @@
                     "portName": null,
                     "ifIndex": 600034,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38774,9 +38776,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38789,9 +38789,11 @@
                     "portName": null,
                     "ifIndex": 600035,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38881,9 +38883,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38896,9 +38896,11 @@
                     "portName": null,
                     "ifIndex": 600036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38988,9 +38990,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39003,9 +39003,11 @@
                     "portName": null,
                     "ifIndex": 600037,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39095,9 +39097,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39110,9 +39110,11 @@
                     "portName": null,
                     "ifIndex": 600038,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39202,9 +39204,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39217,9 +39217,11 @@
                     "portName": null,
                     "ifIndex": 600039,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39309,9 +39311,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39324,9 +39324,11 @@
                     "portName": null,
                     "ifIndex": 600040,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39416,9 +39418,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39431,9 +39431,11 @@
                     "portName": null,
                     "ifIndex": 600041,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39523,9 +39525,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39538,9 +39538,11 @@
                     "portName": null,
                     "ifIndex": 600042,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39630,9 +39632,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39645,9 +39645,11 @@
                     "portName": null,
                     "ifIndex": 600043,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39737,9 +39739,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39752,9 +39752,11 @@
                     "portName": null,
                     "ifIndex": 600044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39844,9 +39846,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39859,9 +39859,11 @@
                     "portName": null,
                     "ifIndex": 600045,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39951,9 +39953,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39966,9 +39966,11 @@
                     "portName": null,
                     "ifIndex": 600046,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40058,9 +40060,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40073,9 +40073,11 @@
                     "portName": null,
                     "ifIndex": 600047,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40165,9 +40167,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40180,9 +40180,11 @@
                     "portName": null,
                     "ifIndex": 600048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40272,9 +40274,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40287,9 +40287,11 @@
                     "portName": null,
                     "ifIndex": 700001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40379,9 +40381,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40394,9 +40394,11 @@
                     "portName": null,
                     "ifIndex": 700002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40486,9 +40488,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40501,9 +40501,11 @@
                     "portName": null,
                     "ifIndex": 700003,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40593,9 +40595,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40608,9 +40608,11 @@
                     "portName": null,
                     "ifIndex": 700004,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40700,9 +40702,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40715,9 +40715,11 @@
                     "portName": null,
                     "ifIndex": 700005,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40807,9 +40809,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40822,9 +40822,11 @@
                     "portName": null,
                     "ifIndex": 700006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40914,9 +40916,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40929,9 +40929,11 @@
                     "portName": null,
                     "ifIndex": 700007,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41021,9 +41023,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41036,9 +41036,11 @@
                     "portName": null,
                     "ifIndex": 700008,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41128,9 +41130,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41143,9 +41143,11 @@
                     "portName": null,
                     "ifIndex": 700009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41235,9 +41237,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41250,9 +41250,11 @@
                     "portName": null,
                     "ifIndex": 700010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41342,9 +41344,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41357,9 +41357,11 @@
                     "portName": null,
                     "ifIndex": 700011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41449,9 +41451,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41464,9 +41464,11 @@
                     "portName": null,
                     "ifIndex": 700012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41556,9 +41558,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41571,9 +41571,11 @@
                     "portName": null,
                     "ifIndex": 700013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41663,9 +41665,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41678,9 +41678,11 @@
                     "portName": null,
                     "ifIndex": 700014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41770,9 +41772,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41785,9 +41785,11 @@
                     "portName": null,
                     "ifIndex": 700015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41877,9 +41879,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41892,9 +41892,11 @@
                     "portName": null,
                     "ifIndex": 700016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41984,9 +41986,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41999,9 +41999,11 @@
                     "portName": null,
                     "ifIndex": 700017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42091,9 +42093,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42106,9 +42106,11 @@
                     "portName": null,
                     "ifIndex": 700018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42198,9 +42200,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42213,9 +42213,11 @@
                     "portName": null,
                     "ifIndex": 700019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42305,9 +42307,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42320,9 +42320,11 @@
                     "portName": null,
                     "ifIndex": 700020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42412,9 +42414,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42427,9 +42427,11 @@
                     "portName": null,
                     "ifIndex": 700021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42519,9 +42521,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42534,9 +42534,11 @@
                     "portName": null,
                     "ifIndex": 700022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42626,9 +42628,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42641,9 +42641,11 @@
                     "portName": null,
                     "ifIndex": 700023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42733,9 +42735,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42748,9 +42748,11 @@
                     "portName": null,
                     "ifIndex": 700024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42840,9 +42842,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42855,9 +42855,11 @@
                     "portName": null,
                     "ifIndex": 700025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42947,9 +42949,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42962,9 +42962,11 @@
                     "portName": null,
                     "ifIndex": 700026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43054,9 +43056,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43069,9 +43069,11 @@
                     "portName": null,
                     "ifIndex": 700027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43161,9 +43163,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43176,9 +43176,11 @@
                     "portName": null,
                     "ifIndex": 700028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43268,9 +43270,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43283,9 +43283,11 @@
                     "portName": null,
                     "ifIndex": 700029,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43375,9 +43377,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43390,9 +43390,11 @@
                     "portName": null,
                     "ifIndex": 700030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43482,9 +43484,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r101-hl01 ",
@@ -43497,9 +43497,11 @@
                     "portName": null,
                     "ifIndex": 700031,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43589,9 +43591,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r102-hl01 ",
@@ -43604,9 +43604,11 @@
                     "portName": null,
                     "ifIndex": 700032,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43696,9 +43698,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43711,9 +43711,11 @@
                     "portName": null,
                     "ifIndex": 700033,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43803,9 +43805,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43818,9 +43818,11 @@
                     "portName": null,
                     "ifIndex": 700034,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43910,9 +43912,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43925,9 +43925,11 @@
                     "portName": null,
                     "ifIndex": 700035,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44017,9 +44019,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44032,9 +44032,11 @@
                     "portName": null,
                     "ifIndex": 700036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44124,9 +44126,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44139,9 +44139,11 @@
                     "portName": null,
                     "ifIndex": 700037,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44231,9 +44233,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44246,9 +44246,11 @@
                     "portName": null,
                     "ifIndex": 700038,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44338,9 +44340,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44353,9 +44353,11 @@
                     "portName": null,
                     "ifIndex": 700039,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44445,9 +44447,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "ams1-r102-hl02 ",
@@ -44460,9 +44460,11 @@
                     "portName": null,
                     "ifIndex": 700040,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44552,9 +44554,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44567,9 +44567,11 @@
                     "portName": null,
                     "ifIndex": 700041,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44659,9 +44661,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44674,9 +44674,11 @@
                     "portName": null,
                     "ifIndex": 700042,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44766,9 +44768,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44781,9 +44781,11 @@
                     "portName": null,
                     "ifIndex": 700043,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44873,9 +44875,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44888,9 +44888,11 @@
                     "portName": null,
                     "ifIndex": 700044,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44980,9 +44982,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44995,9 +44995,11 @@
                     "portName": null,
                     "ifIndex": 700045,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45087,9 +45089,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45102,9 +45102,11 @@
                     "portName": null,
                     "ifIndex": 700046,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45194,9 +45196,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45209,9 +45209,11 @@
                     "portName": null,
                     "ifIndex": 700047,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45301,9 +45303,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45316,9 +45316,11 @@
                     "portName": null,
                     "ifIndex": 700048,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45408,9 +45410,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45423,9 +45423,11 @@
                     "portName": null,
                     "ifIndex": 900001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45515,9 +45517,7 @@
                     "ifOutMulticastPkts": 173404243,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45530,9 +45530,11 @@
                     "portName": null,
                     "ifIndex": 900002,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
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                 {
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                     "portName": null,
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                     "portName": null,
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                 {
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                 {
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                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -46065,9 +46065,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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                     "portName": null,
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                     "ifSpeed": 10000000000,
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                 {
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                     "portName": null,
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                     "ifSpeed": 10000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -46493,9 +46493,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -46585,9 +46587,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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                     "portName": null,
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                     "ifSpeed": 10000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -46707,9 +46707,11 @@
                     "portName": null,
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                 {
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@@ -46814,9 +46814,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -46921,9 +46921,11 @@
                     "portName": null,
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                 {
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@@ -47028,9 +47028,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47135,9 +47135,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -47227,9 +47229,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47242,9 +47242,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47349,9 +47349,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47456,9 +47456,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -47548,9 +47550,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47563,9 +47563,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -47655,9 +47657,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47670,9 +47670,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -47762,9 +47764,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47777,9 +47777,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -47869,9 +47871,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47884,9 +47884,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -47976,9 +47978,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -47991,9 +47991,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -48083,9 +48085,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -48098,9 +48098,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -48190,9 +48192,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -48205,9 +48205,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -48297,9 +48299,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -48312,9 +48312,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -48404,9 +48406,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -48419,9 +48419,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -48511,9 +48513,7 @@
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-                    "ifHighSpeed_prev": null
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                 },
                 {
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@@ -48526,9 +48526,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -48618,9 +48620,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48633,9 +48633,11 @@
                     "portName": null,
                     "ifIndex": 900031,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48725,9 +48727,7 @@
                     "ifOutMulticastPkts": 192839740,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48740,9 +48740,11 @@
                     "portName": null,
                     "ifIndex": 900032,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48832,9 +48834,7 @@
                     "ifOutMulticastPkts": 150829386,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48847,9 +48847,11 @@
                     "portName": null,
                     "ifIndex": 900033,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48939,9 +48941,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48954,9 +48954,11 @@
                     "portName": null,
                     "ifIndex": 900034,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49046,9 +49048,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49061,9 +49061,11 @@
                     "portName": null,
                     "ifIndex": 900035,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49153,9 +49155,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49168,9 +49168,11 @@
                     "portName": null,
                     "ifIndex": 900036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49260,9 +49262,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49275,9 +49275,11 @@
                     "portName": null,
                     "ifIndex": 900037,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49367,9 +49369,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49382,9 +49382,11 @@
                     "portName": null,
                     "ifIndex": 900038,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49474,9 +49476,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49489,9 +49489,11 @@
                     "portName": null,
                     "ifIndex": 900039,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49581,9 +49583,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49596,9 +49596,11 @@
                     "portName": null,
                     "ifIndex": 900040,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49688,9 +49690,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49703,9 +49703,11 @@
                     "portName": null,
                     "ifIndex": 900041,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49795,9 +49797,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49810,9 +49810,11 @@
                     "portName": null,
                     "ifIndex": 900042,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49902,9 +49904,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49917,9 +49917,11 @@
                     "portName": null,
                     "ifIndex": 900043,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50009,9 +50011,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50024,9 +50024,11 @@
                     "portName": null,
                     "ifIndex": 900044,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50116,9 +50118,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50131,9 +50131,11 @@
                     "portName": null,
                     "ifIndex": 900045,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50223,9 +50225,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50238,9 +50238,11 @@
                     "portName": null,
                     "ifIndex": 900046,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50330,9 +50332,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50345,9 +50345,11 @@
                     "portName": null,
                     "ifIndex": 900047,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50437,9 +50439,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50452,9 +50452,11 @@
                     "portName": null,
                     "ifIndex": 900048,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50544,9 +50546,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/anyos.json b/tests/data/anyos.json
index 537860d020..fb1c121e65 100644
--- a/tests/data/anyos.json
+++ b/tests/data/anyos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aos-emu2_ap9320.json b/tests/data/aos-emu2_ap9320.json
index 50e2f9ba76..bc5882e05b 100644
--- a/tests/data/aos-emu2_ap9320.json
+++ b/tests/data/aos-emu2_ap9320.json
@@ -8,13 +8,13 @@
                     "sysDescr": "APC Environmental Management System (MB:v3.6.9 PF:v2.6.4 PN:apc_hw02_aos_264.bin AF1:v2.6.7 AN1:apc_hw02_ems_267.bin MN:AP9320 HR:4 SN: ZA0604022112 MD:01/20/2006)",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "aos-emu2",
                     "type": "environment",
                     "serial": null,
-                    "icon": "apc.svg"
+                    "icon": "apc.svg",
+                    "location": null
                 }
             ]
         },
@@ -28,11 +28,11 @@
                     "version": "v2.6.7",
                     "hardware": "AP9320 4",
                     "features": null,
-                    "location": "<private>",
                     "os": "aos-emu2",
                     "type": "environment",
                     "serial": "ZA0604022112",
-                    "icon": "apc.svg"
+                    "icon": "apc.svg",
+                    "location": "<private>"
                 }
             ]
         }
diff --git a/tests/data/apc-mgeups_galaxy7000.json b/tests/data/apc-mgeups_galaxy7000.json
index 77b1cc2763..1e639c6fbf 100644
--- a/tests/data/apc-mgeups_galaxy7000.json
+++ b/tests/data/apc-mgeups_galaxy7000.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/apc_ats.json b/tests/data/apc_ats.json
index 1fea35214e..18577dc7b1 100644
--- a/tests/data/apc_ats.json
+++ b/tests/data/apc_ats.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/apc_environmental_manager.json b/tests/data/apc_environmental_manager.json
index ac43ffe9fa..47e0a74f75 100644
--- a/tests/data/apc_environmental_manager.json
+++ b/tests/data/apc_environmental_manager.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/apc_smx750i.json b/tests/data/apc_smx750i.json
index 8c94056c5f..36e9b001e1 100644
--- a/tests/data/apc_smx750i.json
+++ b/tests/data/apc_smx750i.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/apex-lynx.json b/tests/data/apex-lynx.json
index ef44e1a690..e17745c378 100644
--- a/tests/data/apex-lynx.json
+++ b/tests/data/apex-lynx.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/apex-plus.json b/tests/data/apex-plus.json
index b33437c126..cdefe72282 100644
--- a/tests/data/apex-plus.json
+++ b/tests/data/apex-plus.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aprisa.json b/tests/data/aprisa.json
index ae075463b8..373156562e 100644
--- a/tests/data/aprisa.json
+++ b/tests/data/aprisa.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/arbos.json b/tests/data/arbos.json
index 48967cf6ec..54091cf3c5 100644
--- a/tests/data/arbos.json
+++ b/tests/data/arbos.json
@@ -119,9 +119,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -211,9 +213,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -226,9 +226,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -318,9 +320,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -333,9 +333,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -425,9 +427,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -440,9 +440,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -532,9 +534,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -547,9 +547,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -639,9 +641,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -654,9 +654,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -746,9 +748,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -761,9 +761,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -853,9 +855,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -868,9 +868,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -960,9 +962,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -975,9 +975,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1067,9 +1069,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1082,9 +1082,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1174,9 +1176,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1189,9 +1189,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1281,9 +1283,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1296,9 +1296,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1388,9 +1390,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1403,9 +1403,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1495,9 +1497,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1514,9 +1514,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1606,9 +1608,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1621,9 +1621,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1713,9 +1715,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1728,9 +1728,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1820,9 +1822,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1835,9 +1835,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1927,9 +1929,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1942,9 +1942,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2034,9 +2036,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2049,9 +2049,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2141,9 +2143,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2156,9 +2156,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2248,9 +2250,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2263,9 +2263,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2355,9 +2357,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2370,9 +2370,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2462,9 +2464,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2477,9 +2477,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2569,9 +2571,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2584,9 +2584,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2676,9 +2678,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2691,9 +2691,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2783,9 +2785,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2798,9 +2798,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2890,9 +2892,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/arista_eos.json b/tests/data/arista_eos.json
index 7ce75b4825..05c361f2b5 100644
--- a/tests/data/arista_eos.json
+++ b/tests/data/arista_eos.json
@@ -987,7 +987,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1035,7 +1035,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1083,7 +1083,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1131,7 +1131,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1179,7 +1179,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1227,7 +1227,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1275,7 +1275,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1323,7 +1323,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1371,7 +1371,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1419,7 +1419,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1467,7 +1467,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1515,7 +1515,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1563,7 +1563,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1611,7 +1611,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1659,7 +1659,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1707,7 +1707,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1755,7 +1755,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1803,7 +1803,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1851,7 +1851,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -29.21,
@@ -1899,7 +1899,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -1947,7 +1947,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -1995,7 +1995,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2043,7 +2043,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2091,7 +2091,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2139,7 +2139,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2187,7 +2187,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2235,7 +2235,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2283,7 +2283,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2331,7 +2331,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": null,
+                    "sensor_current": 0,
                     "sensor_limit": 1,
                     "sensor_limit_warn": -1,
                     "sensor_limit_low": -27.96,
@@ -2452,7 +2452,7 @@
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
                     "sensor_current": 8426,
-                    "sensor_limit": 15166.800000000001,
+                    "sensor_limit": 15166.8,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": 6740.8,
                     "sensor_limit_low_warn": null,
diff --git a/tests/data/arris-apex.json b/tests/data/arris-apex.json
index 588fbefa28..ab19195f00 100644
--- a/tests/data/arris-apex.json
+++ b/tests/data/arris-apex.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/arris-c4.json b/tests/data/arris-c4.json
index 3dc2b9402d..cde0100bc6 100644
--- a/tests/data/arris-c4.json
+++ b/tests/data/arris-c4.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 721432,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 721433,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 721434,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 721440,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 721441,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 721442,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 721448,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 721449,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 721450,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 721456,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 721457,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 721458,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 721464,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 721465,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 721466,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 721472,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 721473,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 721474,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 721480,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 721481,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 721482,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 721488,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 721489,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 721490,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 721496,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 721497,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 721498,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 721504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 721505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 721506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 721512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 721513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 721514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 721520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 721521,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 721522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 786968,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 786969,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 786970,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 786976,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 786977,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 786978,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 786984,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 786985,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 786986,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 786992,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 786993,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 786994,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 787000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 787001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 787002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 787008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 787009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 787010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 787016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 787017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 787018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 787024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 787025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 787026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 787032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 787033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 787034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 787040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 787041,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 787042,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 787048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 787049,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 787050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 787056,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 787057,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 787058,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 787064,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 787065,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 787066,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 787072,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 787073,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 787074,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 787080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 787081,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 787082,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 787088,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 787089,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 787090,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 787096,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 787097,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 787098,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9345,9 +9347,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9360,9 +9360,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifOperStatus": "up",
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@@ -9452,9 +9454,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9467,9 +9467,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9559,9 +9561,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9574,9 +9574,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9666,9 +9668,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9681,9 +9681,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9773,9 +9775,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9880,9 +9882,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9987,9 +9989,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 787120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10094,9 +10096,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10201,9 +10203,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10308,9 +10310,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -10323,9 +10323,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10415,9 +10417,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10522,9 +10524,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10629,9 +10631,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 787137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 787138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 787144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 787145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 787146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 787152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 787153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 787154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 852504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 852505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 852506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 852512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 852513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 852514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 852520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 852521,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 852522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 852528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 852529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 852530,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 852536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 852537,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 852538,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 852544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 852545,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 852546,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 852552,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 852553,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 852554,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 852560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 852561,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 852562,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 852568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 852569,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 852570,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 852576,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 852577,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 852578,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 852584,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 852585,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 852586,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 852592,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 852593,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 852594,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -15459,9 +15459,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifOperStatus": "up",
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@@ -15551,9 +15553,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15566,9 +15566,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifOperStatus": "up",
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@@ -15658,9 +15660,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15673,9 +15673,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -15765,9 +15767,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15780,9 +15780,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -15872,9 +15874,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15887,9 +15887,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -15979,9 +15981,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15994,9 +15994,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -16086,9 +16088,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16101,9 +16101,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -16193,9 +16195,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16208,9 +16208,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -16300,9 +16302,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16315,9 +16315,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -16407,9 +16409,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 990800,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -16514,9 +16516,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16529,9 +16529,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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@@ -16621,9 +16623,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16636,9 +16636,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -16728,9 +16730,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16743,9 +16743,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -16835,9 +16837,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -16942,9 +16944,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -17049,9 +17051,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -17156,9 +17158,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -17263,9 +17265,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -17370,9 +17372,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -17385,9 +17385,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17477,9 +17479,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17492,9 +17492,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17584,9 +17586,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17599,9 +17599,11 @@
                     "portName": null,
                     "ifIndex": 1056296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17691,9 +17693,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17706,9 +17706,11 @@
                     "portName": null,
                     "ifIndex": 1056304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17798,9 +17800,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17813,9 +17813,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17905,9 +17907,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17920,9 +17920,11 @@
                     "portName": null,
                     "ifIndex": 1056320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18012,9 +18014,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18027,9 +18027,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18119,9 +18121,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18134,9 +18134,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18226,9 +18228,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -18241,9 +18241,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18333,9 +18335,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18348,9 +18348,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18440,9 +18442,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18455,9 +18455,11 @@
                     "portName": null,
                     "ifIndex": 1056360,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18547,9 +18549,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -18562,9 +18562,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -18654,9 +18656,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18669,9 +18669,11 @@
                     "portName": null,
                     "ifIndex": 1056376,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18761,9 +18763,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18776,9 +18776,11 @@
                     "portName": null,
                     "ifIndex": 1056384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18868,9 +18870,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18883,9 +18883,11 @@
                     "portName": null,
                     "ifIndex": 1182728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18975,9 +18977,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18990,9 +18990,11 @@
                     "portName": null,
                     "ifIndex": 1182736,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19082,9 +19084,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19097,9 +19097,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19189,9 +19191,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19204,9 +19204,11 @@
                     "portName": null,
                     "ifIndex": 1182752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19296,9 +19298,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19311,9 +19311,11 @@
                     "portName": null,
                     "ifIndex": 1182760,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19403,9 +19405,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19418,9 +19418,11 @@
                     "portName": null,
                     "ifIndex": 1182768,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19510,9 +19512,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19525,9 +19525,11 @@
                     "portName": null,
                     "ifIndex": 1182776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19617,9 +19619,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19632,9 +19632,11 @@
                     "portName": null,
                     "ifIndex": 1182784,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19724,9 +19726,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19739,9 +19739,11 @@
                     "portName": null,
                     "ifIndex": 1182792,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19831,9 +19833,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19846,9 +19846,11 @@
                     "portName": null,
                     "ifIndex": 1182800,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19938,9 +19940,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19953,9 +19953,11 @@
                     "portName": null,
                     "ifIndex": 1182808,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20045,9 +20047,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20060,9 +20060,11 @@
                     "portName": null,
                     "ifIndex": 1312776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20152,9 +20154,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20167,9 +20167,11 @@
                     "portName": null,
                     "ifIndex": 536870914,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20259,9 +20261,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20274,9 +20274,11 @@
                     "portName": null,
                     "ifIndex": 536870915,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20366,9 +20368,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20381,9 +20381,11 @@
                     "portName": null,
                     "ifIndex": 536870916,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20473,9 +20475,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20488,9 +20488,11 @@
                     "portName": null,
                     "ifIndex": 536870917,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20580,9 +20582,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20595,9 +20595,11 @@
                     "portName": null,
                     "ifIndex": 536870926,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20687,9 +20689,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20702,9 +20702,11 @@
                     "portName": null,
                     "ifIndex": 553648129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20794,9 +20796,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 721432,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 721433,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 721434,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 721440,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 721441,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 721442,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 721448,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 721449,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 721450,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 721456,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 721457,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 721458,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 721464,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 721465,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 721466,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 721472,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 721473,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 721474,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 721480,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 721481,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 721482,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 721488,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 721489,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 721490,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 721496,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 721497,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 721498,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 721504,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 721505,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 721506,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 721512,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 721513,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 721514,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 721520,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 721521,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 721522,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 786968,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 786969,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 786970,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 786976,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 786977,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 786978,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 786984,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 786985,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 786986,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 786992,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 786993,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 786994,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 787000,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 787001,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 787002,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 787008,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 787009,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 787010,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 787016,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 787017,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 787018,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 787024,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 787025,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 787026,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 787032,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 787033,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 787034,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 787040,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 787041,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 787042,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 787048,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 787049,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 787050,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 787056,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 787057,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 787058,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 787064,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 787065,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 787066,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 787072,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 787073,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 787074,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 787080,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 787081,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 787082,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 787088,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 787089,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 787090,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 787096,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 787097,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 787098,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 787104,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 787105,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 787106,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 787112,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 787113,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 787114,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 787120,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 787121,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 787122,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 787128,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 787129,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 787130,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 787136,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 787137,
                     "ifSpeed": 5000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 787138,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 787144,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 787145,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 787146,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 787152,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 787153,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 787154,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 852504,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 852505,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 852506,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 852512,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 852513,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 852514,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 852520,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 852521,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 852522,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 852528,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 852529,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 852530,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 852536,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 852537,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 852538,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 852544,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 852545,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 852546,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 852552,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 852553,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 852554,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 852560,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 852561,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 852562,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34937,9 +34937,11 @@
                     "portName": null,
                     "ifIndex": 852568,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35029,9 +35031,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35044,9 +35044,11 @@
                     "portName": null,
                     "ifIndex": 852569,
                     "ifSpeed": 8000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35136,9 +35138,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35151,9 +35151,11 @@
                     "portName": null,
                     "ifIndex": 852570,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35243,9 +35245,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35258,9 +35258,11 @@
                     "portName": null,
                     "ifIndex": 852576,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35350,9 +35352,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35365,9 +35365,11 @@
                     "portName": null,
                     "ifIndex": 852577,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35457,9 +35459,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35472,9 +35472,11 @@
                     "portName": null,
                     "ifIndex": 852578,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35564,9 +35566,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35579,9 +35579,11 @@
                     "portName": null,
                     "ifIndex": 852584,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35671,9 +35673,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35686,9 +35686,11 @@
                     "portName": null,
                     "ifIndex": 852585,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35778,9 +35780,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35793,9 +35793,11 @@
                     "portName": null,
                     "ifIndex": 852586,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35885,9 +35887,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35900,9 +35900,11 @@
                     "portName": null,
                     "ifIndex": 852592,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35992,9 +35994,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36007,9 +36007,11 @@
                     "portName": null,
                     "ifIndex": 852593,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36099,9 +36101,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36114,9 +36114,11 @@
                     "portName": null,
                     "ifIndex": 852594,
                     "ifSpeed": 20000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36206,9 +36208,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36221,9 +36221,11 @@
                     "portName": null,
                     "ifIndex": 990728,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36313,9 +36315,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36328,9 +36328,11 @@
                     "portName": null,
                     "ifIndex": 990736,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36420,9 +36422,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36435,9 +36435,11 @@
                     "portName": null,
                     "ifIndex": 990744,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36527,9 +36529,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36542,9 +36542,11 @@
                     "portName": null,
                     "ifIndex": 990752,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36634,9 +36636,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36649,9 +36649,11 @@
                     "portName": null,
                     "ifIndex": 990760,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36741,9 +36743,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36756,9 +36756,11 @@
                     "portName": null,
                     "ifIndex": 990768,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36848,9 +36850,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36863,9 +36863,11 @@
                     "portName": null,
                     "ifIndex": 990776,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36955,9 +36957,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36970,9 +36970,11 @@
                     "portName": null,
                     "ifIndex": 990784,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37062,9 +37064,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37077,9 +37077,11 @@
                     "portName": null,
                     "ifIndex": 990792,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37169,9 +37171,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37184,9 +37184,11 @@
                     "portName": null,
                     "ifIndex": 990800,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37276,9 +37278,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37291,9 +37291,11 @@
                     "portName": null,
                     "ifIndex": 990808,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37383,9 +37385,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37398,9 +37398,11 @@
                     "portName": null,
                     "ifIndex": 990816,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37490,9 +37492,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37505,9 +37505,11 @@
                     "portName": null,
                     "ifIndex": 990824,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37597,9 +37599,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37612,9 +37612,11 @@
                     "portName": null,
                     "ifIndex": 990832,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37704,9 +37706,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37719,9 +37719,11 @@
                     "portName": null,
                     "ifIndex": 990840,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37811,9 +37813,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37826,9 +37826,11 @@
                     "portName": null,
                     "ifIndex": 990848,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37918,9 +37920,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37933,9 +37933,11 @@
                     "portName": null,
                     "ifIndex": 1056264,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38025,9 +38027,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38040,9 +38040,11 @@
                     "portName": null,
                     "ifIndex": 1056272,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38132,9 +38134,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38147,9 +38147,11 @@
                     "portName": null,
                     "ifIndex": 1056280,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38239,9 +38241,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38254,9 +38254,11 @@
                     "portName": null,
                     "ifIndex": 1056288,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38346,9 +38348,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38361,9 +38361,11 @@
                     "portName": null,
                     "ifIndex": 1056296,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38453,9 +38455,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38468,9 +38468,11 @@
                     "portName": null,
                     "ifIndex": 1056304,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38560,9 +38562,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38575,9 +38575,11 @@
                     "portName": null,
                     "ifIndex": 1056312,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38667,9 +38669,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38682,9 +38682,11 @@
                     "portName": null,
                     "ifIndex": 1056320,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38774,9 +38776,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38789,9 +38789,11 @@
                     "portName": null,
                     "ifIndex": 1056328,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38881,9 +38883,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38896,9 +38896,11 @@
                     "portName": null,
                     "ifIndex": 1056336,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38988,9 +38990,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39003,9 +39003,11 @@
                     "portName": null,
                     "ifIndex": 1056344,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39095,9 +39097,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39110,9 +39110,11 @@
                     "portName": null,
                     "ifIndex": 1056352,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39202,9 +39204,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39217,9 +39217,11 @@
                     "portName": null,
                     "ifIndex": 1056360,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39309,9 +39311,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39324,9 +39324,11 @@
                     "portName": null,
                     "ifIndex": 1056368,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39416,9 +39418,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39431,9 +39431,11 @@
                     "portName": null,
                     "ifIndex": 1056376,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39523,9 +39525,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39538,9 +39538,11 @@
                     "portName": null,
                     "ifIndex": 1056384,
                     "ifSpeed": 56000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 56,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39630,9 +39632,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39645,9 +39645,11 @@
                     "portName": null,
                     "ifIndex": 1182728,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39737,9 +39739,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39752,9 +39752,11 @@
                     "portName": null,
                     "ifIndex": 1182736,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39844,9 +39846,7 @@
                     "ifOutMulticastPkts": 1099656,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39859,9 +39859,11 @@
                     "portName": null,
                     "ifIndex": 1182744,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39951,9 +39953,7 @@
                     "ifOutMulticastPkts": 1099870,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39966,9 +39966,11 @@
                     "portName": null,
                     "ifIndex": 1182752,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40058,9 +40060,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40073,9 +40073,11 @@
                     "portName": null,
                     "ifIndex": 1182760,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40165,9 +40167,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40180,9 +40180,11 @@
                     "portName": null,
                     "ifIndex": 1182768,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40272,9 +40274,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40287,9 +40287,11 @@
                     "portName": null,
                     "ifIndex": 1182776,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40379,9 +40381,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40394,9 +40394,11 @@
                     "portName": null,
                     "ifIndex": 1182784,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40486,9 +40488,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40501,9 +40501,11 @@
                     "portName": null,
                     "ifIndex": 1182792,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40593,9 +40595,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40608,9 +40608,11 @@
                     "portName": null,
                     "ifIndex": 1182800,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40700,9 +40702,7 @@
                     "ifOutMulticastPkts": 22092768,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40715,9 +40715,11 @@
                     "portName": null,
                     "ifIndex": 1182808,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40807,9 +40809,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40822,9 +40822,11 @@
                     "portName": null,
                     "ifIndex": 1312776,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40914,9 +40916,7 @@
                     "ifOutMulticastPkts": 10,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40929,9 +40929,11 @@
                     "portName": null,
                     "ifIndex": 536870914,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41021,9 +41023,7 @@
                     "ifOutMulticastPkts": 20298403,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41036,9 +41036,11 @@
                     "portName": null,
                     "ifIndex": 536870915,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41128,9 +41130,7 @@
                     "ifOutMulticastPkts": 9446360,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41143,9 +41143,11 @@
                     "portName": null,
                     "ifIndex": 536870916,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41235,9 +41237,7 @@
                     "ifOutMulticastPkts": 86867442,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41250,9 +41250,11 @@
                     "portName": null,
                     "ifIndex": 536870917,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41342,9 +41344,7 @@
                     "ifOutMulticastPkts": 31546285,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41357,9 +41357,11 @@
                     "portName": null,
                     "ifIndex": 536870926,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41449,9 +41451,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41464,9 +41464,11 @@
                     "portName": null,
                     "ifIndex": 553648129,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41556,9 +41558,7 @@
                     "ifOutMulticastPkts": 271,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/arris-d5.json b/tests/data/arris-d5.json
index b924d58775..7e7ecefa75 100644
--- a/tests/data/arris-d5.json
+++ b/tests/data/arris-d5.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 65793,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 65794,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 65795,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 65796,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 66049,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 66050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 66051,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 66052,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 49853853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 43770986,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 2,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 1915843,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "subinterface",
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 4167022,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 65793,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 65794,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 65795,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 65796,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 66049,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 66050,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 66051,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 66052,
                     "ifSpeed": 45000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 45,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aruba-instant.json b/tests/data/aruba-instant.json
index f5a8002a93..e0661a647f 100644
--- a/tests/data/aruba-instant.json
+++ b/tests/data/aruba-instant.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 286,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 58,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/aruba-instant_105.json b/tests/data/aruba-instant_105.json
index cf81803bce..65be1475d7 100644
--- a/tests/data/aruba-instant_105.json
+++ b/tests/data/aruba-instant_105.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 132,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 422,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/arubaos.json b/tests/data/arubaos.json
index 400e2d7fdd..6d90189958 100644
--- a/tests/data/arubaos.json
+++ b/tests/data/arubaos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 1442,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 8193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 8194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 8195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 8196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 8197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 8198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 8199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 8200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 16385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 16386,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 16387,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 16388,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 16389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 16390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 16391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 16392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 16393,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7526,9 +7528,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 16394,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7633,9 +7635,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 16395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7740,9 +7742,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 16396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 16397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 16398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 16399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 16400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 16401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 16402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 16403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 16404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 16405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 16406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 16407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 16408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 16409,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 16410,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 16411,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 16412,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 16413,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 16414,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 16415,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 16416,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 50331649,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 50331651,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 134217728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 151006040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 8402056,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 10561229,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 8618149,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 6859,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 9701355,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 10500921,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 10487005,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 10083645,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 20320,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 5975852,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 6489515,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 5383855,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 7857505,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 10195937,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 230,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 10532228,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 7857744,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 605,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 7409347,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 7858419,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 409,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 3546788,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 7234628,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 1442,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 8193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 8194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 1445919,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 8195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 8196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 8197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 8198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 8199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 8200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 16385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 16386,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 16387,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 16388,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 16389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 16390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 16391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 16392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 16393,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 16394,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 16395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 16396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 16397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 16398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 16399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 16400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 16401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 16402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 16403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 16404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 16405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 16406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 16407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 16408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 16409,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 16410,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 16411,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 16412,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 16413,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 16414,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 16415,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 16416,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 50331649,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 50331651,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 134217728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 151006040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ats.json b/tests/data/ats.json
index 2d15bc3cfe..3c98be29e6 100644
--- a/tests/data/ats.json
+++ b/tests/data/ats.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/audiocodes_mp118.json b/tests/data/audiocodes_mp118.json
index 2bd6ace51a..baeb760c07 100644
--- a/tests/data/audiocodes_mp118.json
+++ b/tests/data/audiocodes_mp118.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1141129985,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1141129985,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/avocent_6000.json b/tests/data/avocent_6000.json
index 47a136eba2..4e6b5242e7 100644
--- a/tests/data/avocent_6000.json
+++ b/tests/data/avocent_6000.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/avocent_8000.json b/tests/data/avocent_8000.json
index 37b19ba884..c182aa02eb 100644
--- a/tests/data/avocent_8000.json
+++ b/tests/data/avocent_8000.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/avtech_roomalert4e.json b/tests/data/avtech_roomalert4e.json
index c97a643d10..c0a49f8758 100644
--- a/tests/data/avtech_roomalert4e.json
+++ b/tests/data/avtech_roomalert4e.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/awplus.json b/tests/data/awplus.json
index a2cfc0e940..230bbc53c9 100644
--- a/tests/data/awplus.json
+++ b/tests/data/awplus.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 3920,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 4601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 4607,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 4620,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 5101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 5102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 5103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 5104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 5105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 5106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 5107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 5108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 5109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 5110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 5111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 5112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 5801,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 5805,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 5809,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 5813,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 6101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 6102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 6103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 6104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 6105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 6106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 6107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 6108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 6109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 6110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 6111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 6112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 6801,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 6805,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 6809,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 6813,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 3920,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 4601,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 1160023,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 4607,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 103874,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 4620,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 468135,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 5101,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 69829,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 5102,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 174480,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 5103,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 233806,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5104,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 49109,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 5105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 5106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 5107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 11545,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5108,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 86554,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 5109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 86553,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 5110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 97124,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 5111,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 246663,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 5112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 5801,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 6736506,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 5805,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 5809,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 1082170912,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 5813,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 1203979425,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 6101,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 67582,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 6102,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 57780,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 6103,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 53039,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 6104,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 454398,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 6105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 6106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 6107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 92329,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 6108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 6109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 6110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 6111,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 221472,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 6112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 6801,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 5320402,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 6805,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 6809,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 2304,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 6813,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 2575810268,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/awplus_5.4.8-2.json b/tests/data/awplus_5.4.8-2.json
index 9a0818a380..9ffcaf62a1 100644
--- a/tests/data/awplus_5.4.8-2.json
+++ b/tests/data/awplus_5.4.8-2.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 3900,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 3903,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 3904,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 3910,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 3920,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 3999,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 4501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 4502,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 4503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 4504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 4505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 4506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 4507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 4508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 4509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 4510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 4511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 4512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 4514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 4523,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 4524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 5001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 5002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 5003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 5004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 5005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 5006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 5007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 5008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 5009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 5010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 5011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 5012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 5013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 5014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 5015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 5016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 5017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 5018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 5019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 5020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 5021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 5022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 5023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 5024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 5027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 5028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 5101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 5105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 6001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 6002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 6003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 6004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 6005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 6006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 6007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 6008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 6009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 6010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 6011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 6012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 6013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 6014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 6015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 6016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 6017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 6018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 6019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 6020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 6021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 6022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 6023,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 6024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 6025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 6026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 6027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 6028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 6101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 6105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 3900,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 3903,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 3904,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 3910,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 3920,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 3999,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 4501,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 23185,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 4502,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 10329,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 4503,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 31064,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 4504,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 31183,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 4505,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 30427,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 4506,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 31438,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 4507,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 31091,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 4508,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 31069,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 4509,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 31416,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 4510,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 31156,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 4511,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 31082,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 4512,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 31076,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 4514,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 31086,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 4523,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 21764,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 4524,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 11839,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 5001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 8475,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 5002,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 526,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 5003,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 8246,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 5004,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 8524,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 5005,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 7957,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 5006,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 8518,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 5007,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 8249,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 5008,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 8247,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 5009,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 8530,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 5010,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 8247,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 5011,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 8248,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 5012,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 8247,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 5013,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 30318,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 5014,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 8248,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 5015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 5016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 5017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 5018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 5019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 5020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 5021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 5022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 5023,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 8220,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 5024,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 2102,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 5027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 5028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 5101,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 8626,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 5105,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 177129,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 6001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 14710,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 6002,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 9803,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 6003,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 22818,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 6004,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 22659,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 6005,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 22470,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 6006,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 22920,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 6007,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 22842,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 6008,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 22822,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 6009,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 22886,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 6010,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 22909,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 6011,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 22834,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 6012,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 22829,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 6013,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 30922,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 6014,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 22838,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 6015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 6016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 6017,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 6018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 6019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 6020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 6021,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 6022,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 6023,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 13544,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 6024,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 9737,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 6025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 6026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 6027,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 6028,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 6101,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 632762,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 6105,
                     "ifSpeed": 42000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 42000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 1756,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/barracudangfirewall.json b/tests/data/barracudangfirewall.json
index 1cab58b9de..42cbde6aa1 100644
--- a/tests/data/barracudangfirewall.json
+++ b/tests/data/barracudangfirewall.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 3689,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 7752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 11819,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 11954,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 19060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 31621,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 31771,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 32398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 33560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 35406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 41874,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 48660,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 49771,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 51493,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 54030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 56043,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 62463,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 65045,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 3689,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 7752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 11819,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 11954,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 19060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 31621,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 31771,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 32398,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 33560,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 35406,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 41874,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 48660,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 49771,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 51493,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 54030,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 56043,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 62463,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 65045,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/barracudaspamfirewall.json b/tests/data/barracudaspamfirewall.json
index e54b7a99ba..ce8832d17c 100644
--- a/tests/data/barracudaspamfirewall.json
+++ b/tests/data/barracudaspamfirewall.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/barracudaspamfirewall_email_sg.json b/tests/data/barracudaspamfirewall_email_sg.json
index 529848b4dc..c1489fcfaa 100644
--- a/tests/data/barracudaspamfirewall_email_sg.json
+++ b/tests/data/barracudaspamfirewall_email_sg.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/barracudawafirewall.json b/tests/data/barracudawafirewall.json
index cec3b4d420..a02726004e 100644
--- a/tests/data/barracudawafirewall.json
+++ b/tests/data/barracudawafirewall.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/bluecatnetworks.json b/tests/data/bluecatnetworks.json
index 2cc83f7c22..1edd37d171 100644
--- a/tests/data/bluecatnetworks.json
+++ b/tests/data/bluecatnetworks.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/boss_ers3510.json b/tests/data/boss_ers3510.json
index f0d670eea2..f3509236d1 100644
--- a/tests/data/boss_ers3510.json
+++ b/tests/data/boss_ers3510.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 2526825,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "server",
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 61590881,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "server",
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 60170402,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/boss_ers4950.json b/tests/data/boss_ers4950.json
index 97551887c1..412806320c 100644
--- a/tests/data/boss_ers4950.json
+++ b/tests/data/boss_ers4950.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 8193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 55001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 3888360,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "fa",
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 212206,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "fa",
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 132519,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 8193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 55001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/canonprinter_lbp.json b/tests/data/canonprinter_lbp.json
index ba154a3623..d550999069 100644
--- a/tests/data/canonprinter_lbp.json
+++ b/tests/data/canonprinter_lbp.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/cdata.json b/tests/data/cdata.json
index 4fc9d1014a..ca33dbd730 100644
--- a/tests/data/cdata.json
+++ b/tests/data/cdata.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 16777472,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 16777728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 16777984,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 16778240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 16778496,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 16778752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 16779008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 16779264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 16779520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 16779776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 16780032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 16780288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 16780544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 16780800,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 16781056,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16781312,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 16781568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 16781824,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 16782080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 16782336,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 16777472,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 16777728,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 16777984,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 16778240,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 16778496,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 16778752,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 16779008,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 16779264,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 16779520,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 16779776,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 16780032,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 16780288,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 16780544,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 16780800,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 16781056,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 16781312,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 16781568,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 16781824,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 16782080,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 16782336,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ceraos.json b/tests/data/ceraos.json
index 902403019c..81067f7f54 100644
--- a/tests/data/ceraos.json
+++ b/tests/data/ceraos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 268443713,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 268443714,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 268451969,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 268451970,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 268460097,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 268562561,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 268443713,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 1786101,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 268443714,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 51483,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 268451969,
                     "ifSpeed": 445000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 445,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 268451970,
                     "ifSpeed": 445000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 445,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 268460097,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 268562561,
                     "ifSpeed": 890000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 890,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/chatsworth-pdu.json b/tests/data/chatsworth-pdu.json
index ff8f3757f3..eab6cc28a0 100644
--- a/tests/data/chatsworth-pdu.json
+++ b/tests/data/chatsworth-pdu.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -2431,7 +2431,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.0954138888888889,
+                    "sensor_current": 0.095413888888889,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2455,7 +2455,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.16114722222222222,
+                    "sensor_current": 0.16114722222222,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2479,7 +2479,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.05204444444444444,
+                    "sensor_current": 0.052044444444444,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2503,7 +2503,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.026269444444444446,
+                    "sensor_current": 0.026269444444444,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2527,7 +2527,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.03630277777777778,
+                    "sensor_current": 0.036302777777778,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2551,7 +2551,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 39.53948888888889,
+                    "sensor_current": 39.539488888889,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2575,7 +2575,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.07034722222222223,
+                    "sensor_current": 0.070347222222222,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2599,7 +2599,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.026488888888888888,
+                    "sensor_current": 0.026488888888889,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2623,7 +2623,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.1581138888888889,
+                    "sensor_current": 0.15811388888889,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2647,7 +2647,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.15985555555555556,
+                    "sensor_current": 0.15985555555556,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2671,7 +2671,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.08894722222222222,
+                    "sensor_current": 0.088947222222222,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2695,7 +2695,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.03457222222222222,
+                    "sensor_current": 0.034572222222222,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2719,7 +2719,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.030833333333333334,
+                    "sensor_current": 0.030833333333333,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2743,7 +2743,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.03078611111111111,
+                    "sensor_current": 0.030786111111111,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2767,7 +2767,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.07928611111111111,
+                    "sensor_current": 0.079286111111111,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2791,7 +2791,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.026316666666666665,
+                    "sensor_current": 0.026316666666667,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2815,7 +2815,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.045083333333333336,
+                    "sensor_current": 0.045083333333333,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2863,7 +2863,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.13018055555555555,
+                    "sensor_current": 0.13018055555556,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2887,7 +2887,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.23522222222222222,
+                    "sensor_current": 0.23522222222222,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2935,7 +2935,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.02856388888888889,
+                    "sensor_current": 0.028563888888889,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2959,7 +2959,7 @@
                     "group": null,
                     "sensor_divisor": 360000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.028533333333333334,
+                    "sensor_current": 0.028533333333333,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -4142,7 +4142,2906 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.6.1.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "1.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName1",
+                    "group": null,
+                    "sensor_divisor": 100,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.6.10.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "10.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName10",
+                    "group": null,
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+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.24.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "24.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName24",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.3.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "3.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName3",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.4.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "4.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName4",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.5.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "5.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName5",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.6.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "6.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName6",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.7.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "7.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName7",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.8.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "8.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName8",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.30932.1.10.1.4.10.1.7.9.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_index": "9.12.48.48.48.69.68.51.48.48.65.68.50.49",
+                    "sensor_type": "chatsworth-pdu",
+                    "sensor_descr": "OutletName9",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 207.2,
+                    "sensor_limit": 238.28,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 176.12,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "cpiPduOutletControl",
+                    "state_descr": "Off",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "cpiPduOutletControl",
+                    "state_descr": "On",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                }
+            ]
+        }
     },
     "storage": {
         "discovery": {
diff --git a/tests/data/ciena-waveserver.json b/tests/data/ciena-waveserver.json
index 6b0a556665..0ce292b1aa 100644
--- a/tests/data/ciena-waveserver.json
+++ b/tests/data/ciena-waveserver.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ciscosb.json b/tests/data/ciscosb.json
index a02c6963e4..47069f3d75 100644
--- a/tests/data/ciscosb.json
+++ b/tests/data/ciscosb.json
@@ -69,9 +69,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -161,9 +163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -176,9 +176,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -268,9 +270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -283,9 +283,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -375,9 +377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -390,9 +390,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -482,9 +484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -497,9 +497,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -589,9 +591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -604,9 +604,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -696,9 +698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -711,9 +711,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -803,9 +805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -818,9 +818,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -910,9 +912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -925,9 +925,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1017,9 +1019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1036,9 +1036,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1128,9 +1130,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1143,9 +1143,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1235,9 +1237,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1250,9 +1250,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1342,9 +1344,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1357,9 +1357,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1449,9 +1451,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1464,9 +1464,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1556,9 +1558,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1571,9 +1571,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1663,9 +1665,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1678,9 +1678,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1770,9 +1772,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1785,9 +1785,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1877,9 +1879,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1892,9 +1892,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1984,9 +1986,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ciscosb_sg350-10.json b/tests/data/ciscosb_sg350-10.json
index 5ee603cd72..1db0d0ba5b 100644
--- a/tests/data/ciscosb_sg350-10.json
+++ b/tests/data/ciscosb_sg350-10.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -120,9 +120,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -212,9 +214,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -227,9 +227,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -319,9 +321,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -334,9 +334,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -426,9 +428,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -441,9 +441,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -533,9 +535,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -548,9 +548,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -640,9 +642,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -655,9 +655,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -747,9 +749,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -762,9 +762,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -854,9 +856,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -869,9 +869,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -961,9 +963,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -976,9 +976,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1068,9 +1070,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1083,9 +1083,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1175,9 +1177,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1190,9 +1190,11 @@
                     "portName": null,
                     "ifIndex": 9000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1282,9 +1284,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1297,9 +1297,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1389,9 +1391,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1404,9 +1404,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1496,9 +1498,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1515,9 +1515,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1607,9 +1609,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1622,9 +1622,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1714,9 +1716,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1729,9 +1729,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1821,9 +1823,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1836,9 +1836,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1928,9 +1930,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1943,9 +1943,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2035,9 +2037,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2050,9 +2050,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2142,9 +2144,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2157,9 +2157,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2249,9 +2251,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2264,9 +2264,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2356,9 +2358,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2371,9 +2371,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2463,9 +2465,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2478,9 +2478,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2570,9 +2572,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2585,9 +2585,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2677,9 +2679,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2692,9 +2692,11 @@
                     "portName": null,
                     "ifIndex": 9000,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2784,9 +2786,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2799,9 +2799,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2891,9 +2893,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2906,9 +2906,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2998,9 +3000,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ciscosb_sx550x-24f.json b/tests/data/ciscosb_sx550x-24f.json
index 0809c19b06..9f556abca6 100644
--- a/tests/data/ciscosb_sx550x-24f.json
+++ b/tests/data/ciscosb_sx550x-24f.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 1050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 8000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 9000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 100088,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 100098,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 100199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 1117347,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 2889439,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 2894462,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 2907309,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 2920159,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 2909434,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 2909865,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 2892934,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 2411286,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 2906430,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 1097890,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 1088327,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 1162670,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 1162562,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 1162672,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 1162564,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 8000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 9000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 100088,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 100098,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 100199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -7641,7 +7641,7 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.0058719999999999996,
+                    "sensor_current": 0.005872,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7665,7 +7665,7 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.0083770000000000008,
+                    "sensor_current": 0.008377,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7689,7 +7689,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3789999999999996,
+                    "sensor_current": -6.379,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7713,7 +7713,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -8.0749999999999993,
+                    "sensor_current": -8.075,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7737,7 +7737,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -13.635999999999999,
+                    "sensor_current": -13.636,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7761,7 +7761,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3789999999999996,
+                    "sensor_current": -6.379,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7785,7 +7785,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.1550000000000002,
+                    "sensor_current": -6.155,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7809,7 +7809,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.9859999999999998,
+                    "sensor_current": -5.986,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7833,7 +7833,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.0069999999999997,
+                    "sensor_current": -6.007,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7857,7 +7857,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3460000000000001,
+                    "sensor_current": -6.346,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -7905,7 +7905,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.8559999999999999,
+                    "sensor_current": -5.856,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8625,10 +8625,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2751999999999999,
-                    "sensor_limit": 3.7664800000000001,
+                    "sensor_current": 3.2752,
+                    "sensor_limit": 3.76648,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7839200000000002,
+                    "sensor_limit_low": 2.78392,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -8649,10 +8649,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2808000000000002,
-                    "sensor_limit": 3.7729200000000001,
+                    "sensor_current": 3.2808,
+                    "sensor_limit": 3.77292,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7886799999999998,
+                    "sensor_limit_low": 2.78868,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -8673,10 +8673,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2728000000000002,
-                    "sensor_limit": 3.7637200000000002,
+                    "sensor_current": 3.2728,
+                    "sensor_limit": 3.76372,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7818800000000001,
+                    "sensor_limit_low": 2.78188,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -8697,10 +8697,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2759999999999998,
-                    "sensor_limit": 3.7673999999999999,
+                    "sensor_current": 3.276,
+                    "sensor_limit": 3.7674,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7846000000000002,
+                    "sensor_limit_low": 2.7846,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -8721,10 +8721,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2671000000000001,
-                    "sensor_limit": 3.7571650000000001,
+                    "sensor_current": 3.2671,
+                    "sensor_limit": 3.757165,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7770350000000001,
+                    "sensor_limit_low": 2.777035,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -8837,7 +8837,7 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.0058719999999999996,
+                    "sensor_current": 0.005872,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8861,7 +8861,7 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.0083770000000000008,
+                    "sensor_current": 0.008377,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8885,7 +8885,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3789999999999996,
+                    "sensor_current": -6.379,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8909,7 +8909,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -8.0749999999999993,
+                    "sensor_current": -8.075,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8933,7 +8933,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -13.635999999999999,
+                    "sensor_current": -13.636,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8957,7 +8957,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3789999999999996,
+                    "sensor_current": -6.379,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -8981,7 +8981,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.1550000000000002,
+                    "sensor_current": -6.155,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -9005,7 +9005,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.9859999999999998,
+                    "sensor_current": -5.986,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -9029,7 +9029,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.0069999999999997,
+                    "sensor_current": -6.007,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -9053,7 +9053,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.3460000000000001,
+                    "sensor_current": -6.346,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -9101,7 +9101,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.8559999999999999,
+                    "sensor_current": -5.856,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -9821,10 +9821,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2751999999999999,
-                    "sensor_limit": 3.7664800000000001,
+                    "sensor_current": 3.2752,
+                    "sensor_limit": 3.76648,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7839200000000002,
+                    "sensor_limit_low": 2.78392,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -9845,10 +9845,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2808000000000002,
-                    "sensor_limit": 3.7729200000000001,
+                    "sensor_current": 3.2808,
+                    "sensor_limit": 3.77292,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7886799999999998,
+                    "sensor_limit_low": 2.78868,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -9869,10 +9869,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2728000000000002,
-                    "sensor_limit": 3.7637200000000002,
+                    "sensor_current": 3.2728,
+                    "sensor_limit": 3.76372,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7818800000000001,
+                    "sensor_limit_low": 2.78188,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -9893,10 +9893,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2759999999999998,
-                    "sensor_limit": 3.7673999999999999,
+                    "sensor_current": 3.276,
+                    "sensor_limit": 3.7674,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7846000000000002,
+                    "sensor_limit_low": 2.7846,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
@@ -9917,10 +9917,10 @@
                     "group": null,
                     "sensor_divisor": 1000000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 3.2671000000000001,
-                    "sensor_limit": 3.7571650000000001,
+                    "sensor_current": 3.2671,
+                    "sensor_limit": 3.757165,
                     "sensor_limit_warn": null,
-                    "sensor_limit_low": 2.7770350000000001,
+                    "sensor_limit_low": 2.777035,
                     "sensor_limit_low_warn": null,
                     "sensor_alert": 1,
                     "sensor_custom": "No",
diff --git a/tests/data/cmm.json b/tests/data/cmm.json
index 4801690f99..68967eca2b 100644
--- a/tests/data/cmm.json
+++ b/tests/data/cmm.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 0,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 8725689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 8725689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 8725689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 8355360,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 8725031,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 752498,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 8725689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/comtrol.json b/tests/data/comtrol.json
index 498b6ad176..10178eed31 100644
--- a/tests/data/comtrol.json
+++ b/tests/data/comtrol.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/comware.json b/tests/data/comware.json
index 9cb3ace9a9..85ec3a583e 100644
--- a/tests/data/comware.json
+++ b/tests/data/comware.json
@@ -113,9 +113,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -205,9 +207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -220,9 +220,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -312,9 +314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -327,9 +327,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -419,9 +421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -434,9 +434,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -526,9 +528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -541,9 +541,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -633,9 +635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -648,9 +648,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -740,9 +742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -755,9 +755,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -847,9 +849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -862,9 +862,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -954,9 +956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -969,9 +969,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1061,9 +1063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1076,9 +1076,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1168,9 +1170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1183,9 +1183,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1275,9 +1277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1290,9 +1290,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1382,9 +1384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1397,9 +1397,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1489,9 +1491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1504,9 +1504,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1596,9 +1598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1611,9 +1611,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1703,9 +1705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1718,9 +1718,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1810,9 +1812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1825,9 +1825,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1917,9 +1919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1932,9 +1932,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2024,9 +2026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2039,9 +2039,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2131,9 +2133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2146,9 +2146,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2238,9 +2240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2253,9 +2253,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2345,9 +2347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2360,9 +2360,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2452,9 +2454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2467,9 +2467,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2559,9 +2561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2574,9 +2574,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2666,9 +2668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2681,9 +2681,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2773,9 +2775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2788,9 +2788,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2880,9 +2882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2895,9 +2895,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2987,9 +2989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3002,9 +3002,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3094,9 +3096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3109,9 +3109,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3201,9 +3203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3216,9 +3216,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3308,9 +3310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3323,9 +3323,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3415,9 +3417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3430,9 +3430,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3522,9 +3524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3537,9 +3537,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3629,9 +3631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3644,9 +3644,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3736,9 +3738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3751,9 +3751,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3843,9 +3845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3858,9 +3858,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3950,9 +3952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3965,9 +3965,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4057,9 +4059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4072,9 +4072,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4164,9 +4166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4179,9 +4179,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4271,9 +4273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4286,9 +4286,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4378,9 +4380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4393,9 +4393,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4485,9 +4487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4500,9 +4500,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4592,9 +4594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4607,9 +4607,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4699,9 +4701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4714,9 +4714,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4806,9 +4808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4821,9 +4821,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4913,9 +4915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4928,9 +4928,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5020,9 +5022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5035,9 +5035,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5127,9 +5129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5142,9 +5142,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5234,9 +5236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5249,9 +5249,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5341,9 +5343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5356,9 +5356,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5448,9 +5450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5463,9 +5463,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5555,9 +5557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5570,9 +5570,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5662,9 +5664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5677,9 +5677,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5769,9 +5771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5784,9 +5784,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5876,9 +5878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5891,9 +5891,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5983,9 +5985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5998,9 +5998,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6090,9 +6092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6105,9 +6105,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6197,9 +6199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6212,9 +6212,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6304,9 +6306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6319,9 +6319,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6411,9 +6413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6426,9 +6426,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6518,9 +6520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6533,9 +6533,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6625,9 +6627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6640,9 +6640,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6732,9 +6734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6747,9 +6747,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6839,9 +6841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6854,9 +6854,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6946,9 +6948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6961,9 +6961,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7053,9 +7055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7068,9 +7068,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7160,9 +7162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7175,9 +7175,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7267,9 +7269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7282,9 +7282,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7374,9 +7376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7389,9 +7389,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7481,9 +7483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7496,9 +7496,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7588,9 +7590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7603,9 +7603,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7695,9 +7697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7710,9 +7710,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7802,9 +7804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7817,9 +7817,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7909,9 +7911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7924,9 +7924,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8016,9 +8018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8031,9 +8031,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8123,9 +8125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8138,9 +8138,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8230,9 +8232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8245,9 +8245,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8337,9 +8339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8352,9 +8352,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8444,9 +8446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8459,9 +8459,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8551,9 +8553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8566,9 +8566,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8658,9 +8660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8673,9 +8673,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8765,9 +8767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8780,9 +8780,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8872,9 +8874,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8887,9 +8887,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8979,9 +8981,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8994,9 +8994,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9086,9 +9088,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9101,9 +9101,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9193,9 +9195,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9208,9 +9208,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9300,9 +9302,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9315,9 +9315,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9407,9 +9409,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9422,9 +9422,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9514,9 +9516,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9529,9 +9529,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9621,9 +9623,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9636,9 +9636,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9728,9 +9730,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9743,9 +9743,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9835,9 +9837,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9850,9 +9850,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9942,9 +9944,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9957,9 +9957,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10049,9 +10051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10064,9 +10064,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10156,9 +10158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10171,9 +10171,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10263,9 +10265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10278,9 +10278,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10370,9 +10372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10385,9 +10385,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10477,9 +10479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10492,9 +10492,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10584,9 +10586,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10599,9 +10599,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10691,9 +10693,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10706,9 +10706,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10798,9 +10800,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10813,9 +10813,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10905,9 +10907,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10920,9 +10920,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11012,9 +11014,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11027,9 +11027,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11119,9 +11121,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11134,9 +11134,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11226,9 +11228,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11241,9 +11241,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11333,9 +11335,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11348,9 +11348,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11440,9 +11442,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11455,9 +11455,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11547,9 +11549,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11562,9 +11562,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11654,9 +11656,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11669,9 +11669,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11761,9 +11763,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11776,9 +11776,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11868,9 +11870,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11883,9 +11883,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11975,9 +11977,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11990,9 +11990,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12082,9 +12084,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12097,9 +12097,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12189,9 +12191,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12204,9 +12204,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12296,9 +12298,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12311,9 +12311,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12403,9 +12405,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12418,9 +12418,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12510,9 +12512,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12525,9 +12525,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12617,9 +12619,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12632,9 +12632,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12724,9 +12726,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12739,9 +12739,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12831,9 +12833,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12846,9 +12846,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12938,9 +12940,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12953,9 +12953,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13045,9 +13047,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13060,9 +13060,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13152,9 +13154,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13167,9 +13167,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13259,9 +13261,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13274,9 +13274,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13366,9 +13368,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13381,9 +13381,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13473,9 +13475,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13488,9 +13488,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13580,9 +13582,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13595,9 +13595,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13687,9 +13689,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13702,9 +13702,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13794,9 +13796,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13809,9 +13809,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13901,9 +13903,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13916,9 +13916,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14008,9 +14010,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14023,9 +14023,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14115,9 +14117,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14130,9 +14130,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14222,9 +14224,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14237,9 +14237,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14329,9 +14331,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14344,9 +14344,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14436,9 +14438,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14451,9 +14451,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14543,9 +14545,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14558,9 +14558,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14650,9 +14652,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14665,9 +14665,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14757,9 +14759,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14772,9 +14772,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14864,9 +14866,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14879,9 +14879,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14971,9 +14973,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14986,9 +14986,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15078,9 +15080,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15093,9 +15093,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15185,9 +15187,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15200,9 +15200,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15292,9 +15294,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15307,9 +15307,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15399,9 +15401,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15414,9 +15414,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15506,9 +15508,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15521,9 +15521,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15613,9 +15615,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15628,9 +15628,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15720,9 +15722,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15735,9 +15735,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15827,9 +15829,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15842,9 +15842,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15934,9 +15936,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15949,9 +15949,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16041,9 +16043,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16056,9 +16056,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16148,9 +16150,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16163,9 +16163,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16255,9 +16257,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16270,9 +16270,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16362,9 +16364,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16377,9 +16377,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16469,9 +16471,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16484,9 +16484,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16576,9 +16578,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16591,9 +16591,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16683,9 +16685,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16698,9 +16698,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16790,9 +16792,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16805,9 +16805,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16897,9 +16899,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16912,9 +16912,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17004,9 +17006,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17019,9 +17019,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17111,9 +17113,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17126,9 +17126,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17218,9 +17220,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17233,9 +17233,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17325,9 +17327,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17340,9 +17340,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17432,9 +17434,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17447,9 +17447,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17539,9 +17541,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17554,9 +17554,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17646,9 +17648,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17661,9 +17661,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17753,9 +17755,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17768,9 +17768,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17860,9 +17862,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17875,9 +17875,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17967,9 +17969,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17982,9 +17982,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18074,9 +18076,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18089,9 +18089,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -18181,9 +18183,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18196,9 +18196,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": null,
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@@ -18288,9 +18290,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -18303,9 +18303,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -18395,9 +18397,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18410,9 +18410,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -18502,9 +18504,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18517,9 +18517,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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@@ -18609,9 +18611,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18624,9 +18624,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -18716,9 +18718,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18731,9 +18731,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -18823,9 +18825,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18838,9 +18838,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -18930,9 +18932,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -18945,9 +18945,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -19037,9 +19039,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19052,9 +19052,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "down",
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@@ -19144,9 +19146,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19159,9 +19159,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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@@ -19251,9 +19253,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19266,9 +19266,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19358,9 +19360,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19373,9 +19373,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19465,9 +19467,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19480,9 +19480,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19572,9 +19574,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19587,9 +19587,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -19679,9 +19681,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -19694,9 +19694,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -19786,9 +19788,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -19801,9 +19801,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -19893,9 +19895,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -19908,9 +19908,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20000,9 +20002,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -20015,9 +20015,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20107,9 +20109,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20122,9 +20122,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20214,9 +20216,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -20229,9 +20229,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20321,9 +20323,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20336,9 +20336,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20428,9 +20430,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20443,9 +20443,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20535,9 +20537,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20550,9 +20550,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20642,9 +20644,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -20657,9 +20657,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20749,9 +20751,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20764,9 +20764,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20856,9 +20858,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20871,9 +20871,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20963,9 +20965,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20978,9 +20978,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21070,9 +21072,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21085,9 +21085,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21177,9 +21179,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21192,9 +21192,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21284,9 +21286,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21299,9 +21299,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21391,9 +21393,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21406,9 +21406,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21498,9 +21500,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21513,9 +21513,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21605,9 +21607,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21620,9 +21620,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21712,9 +21714,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21727,9 +21727,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21819,9 +21821,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21834,9 +21834,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21926,9 +21928,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21941,9 +21941,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22033,9 +22035,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22048,9 +22048,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22140,9 +22142,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22155,9 +22155,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22247,9 +22249,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22262,9 +22262,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22354,9 +22356,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22369,9 +22369,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22461,9 +22463,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22476,9 +22476,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22568,9 +22570,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22583,9 +22583,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22675,9 +22677,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22690,9 +22690,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22782,9 +22784,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22797,9 +22797,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22889,9 +22891,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22904,9 +22904,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22996,9 +22998,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23011,9 +23011,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23103,9 +23105,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23118,9 +23118,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23210,9 +23212,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23225,9 +23225,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23317,9 +23319,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23332,9 +23332,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23424,9 +23426,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23439,9 +23439,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23531,9 +23533,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23546,9 +23546,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23638,9 +23640,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23653,9 +23653,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23745,9 +23747,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23760,9 +23760,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23852,9 +23854,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23867,9 +23867,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23959,9 +23961,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23974,9 +23974,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24066,9 +24068,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24081,9 +24081,11 @@
                     "portName": null,
                     "ifIndex": 233,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24173,9 +24175,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24188,9 +24188,11 @@
                     "portName": null,
                     "ifIndex": 234,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24280,9 +24282,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24295,9 +24295,11 @@
                     "portName": null,
                     "ifIndex": 235,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24387,9 +24389,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24402,9 +24402,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24494,9 +24496,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24509,9 +24509,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24601,9 +24603,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24616,9 +24616,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24708,9 +24710,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24723,9 +24723,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24815,9 +24817,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24830,9 +24830,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24922,9 +24924,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -24941,9 +24941,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25033,9 +25035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25048,9 +25048,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25140,9 +25142,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25155,9 +25155,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25247,9 +25249,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25262,9 +25262,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25354,9 +25356,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25369,9 +25369,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25461,9 +25463,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25476,9 +25476,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25568,9 +25570,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25583,9 +25583,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25675,9 +25677,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25690,9 +25690,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25782,9 +25784,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25797,9 +25797,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25889,9 +25891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25904,9 +25904,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25996,9 +25998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26011,9 +26011,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26103,9 +26105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26118,9 +26118,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26210,9 +26212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26225,9 +26225,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26317,9 +26319,7 @@
                     "ifOutMulticastPkts": 348567,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26332,9 +26332,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26424,9 +26426,7 @@
                     "ifOutMulticastPkts": 309150,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26439,9 +26439,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26531,9 +26533,7 @@
                     "ifOutMulticastPkts": 370594,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26546,9 +26546,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26638,9 +26640,7 @@
                     "ifOutMulticastPkts": 48292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26653,9 +26653,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26745,9 +26747,7 @@
                     "ifOutMulticastPkts": 360226,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26760,9 +26760,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26852,9 +26854,7 @@
                     "ifOutMulticastPkts": 383314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26867,9 +26867,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26959,9 +26961,7 @@
                     "ifOutMulticastPkts": 360534,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26974,9 +26974,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27066,9 +27068,7 @@
                     "ifOutMulticastPkts": 359536,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27081,9 +27081,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27173,9 +27175,7 @@
                     "ifOutMulticastPkts": 379428,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27188,9 +27188,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27280,9 +27282,7 @@
                     "ifOutMulticastPkts": 358070,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27295,9 +27295,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27387,9 +27389,7 @@
                     "ifOutMulticastPkts": 366397,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27402,9 +27402,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27494,9 +27496,7 @@
                     "ifOutMulticastPkts": 284887,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27509,9 +27509,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27601,9 +27603,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27616,9 +27616,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27708,9 +27710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27723,9 +27723,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27815,9 +27817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27830,9 +27830,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27922,9 +27924,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27937,9 +27937,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28029,9 +28031,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28044,9 +28044,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28136,9 +28138,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28151,9 +28151,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28243,9 +28245,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28258,9 +28258,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28350,9 +28352,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28365,9 +28365,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28457,9 +28459,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28472,9 +28472,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28564,9 +28566,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28579,9 +28579,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28671,9 +28673,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28686,9 +28686,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28778,9 +28780,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28793,9 +28793,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28885,9 +28887,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28900,9 +28900,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28992,9 +28994,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29007,9 +29007,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29099,9 +29101,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29114,9 +29114,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29206,9 +29208,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29221,9 +29221,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29313,9 +29315,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29328,9 +29328,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29420,9 +29422,7 @@
                     "ifOutMulticastPkts": 1498160,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29435,9 +29435,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29527,9 +29529,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29542,9 +29542,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29634,9 +29636,7 @@
                     "ifOutMulticastPkts": 2489410,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29649,9 +29649,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29741,9 +29743,7 @@
                     "ifOutMulticastPkts": 3811891,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29756,9 +29756,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29848,9 +29850,7 @@
                     "ifOutMulticastPkts": 297112,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29863,9 +29863,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29955,9 +29957,7 @@
                     "ifOutMulticastPkts": 3996127,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29970,9 +29970,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30062,9 +30064,7 @@
                     "ifOutMulticastPkts": 304957,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30077,9 +30077,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30169,9 +30171,7 @@
                     "ifOutMulticastPkts": 3898446,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30184,9 +30184,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30276,9 +30278,7 @@
                     "ifOutMulticastPkts": 3904744,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30291,9 +30291,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30383,9 +30385,7 @@
                     "ifOutMulticastPkts": 4063596,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30398,9 +30398,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30490,9 +30492,7 @@
                     "ifOutMulticastPkts": 4287089,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30505,9 +30505,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30597,9 +30599,7 @@
                     "ifOutMulticastPkts": 4562171,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30612,9 +30612,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30704,9 +30706,7 @@
                     "ifOutMulticastPkts": 4339258,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30719,9 +30719,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30811,9 +30813,7 @@
                     "ifOutMulticastPkts": 3993374,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30826,9 +30826,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30918,9 +30920,7 @@
                     "ifOutMulticastPkts": 1782820,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30933,9 +30933,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31025,9 +31027,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31040,9 +31040,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31132,9 +31134,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31147,9 +31147,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31239,9 +31241,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31254,9 +31254,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31346,9 +31348,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31361,9 +31361,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31453,9 +31455,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31468,9 +31468,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31560,9 +31562,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31575,9 +31575,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31667,9 +31669,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31682,9 +31682,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31774,9 +31776,7 @@
                     "ifOutMulticastPkts": 41965108,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31789,9 +31789,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31881,9 +31883,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31896,9 +31896,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31988,9 +31990,7 @@
                     "ifOutMulticastPkts": 37871238,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32003,9 +32003,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32095,9 +32097,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32110,9 +32110,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32202,9 +32204,7 @@
                     "ifOutMulticastPkts": 30115351,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32217,9 +32217,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32309,9 +32311,7 @@
                     "ifOutMulticastPkts": 30052074,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32324,9 +32324,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32416,9 +32418,7 @@
                     "ifOutMulticastPkts": 34588470,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32431,9 +32431,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32523,9 +32525,7 @@
                     "ifOutMulticastPkts": 34284314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32538,9 +32538,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32630,9 +32632,7 @@
                     "ifOutMulticastPkts": 34367870,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32645,9 +32645,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32737,9 +32739,7 @@
                     "ifOutMulticastPkts": 34361501,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32752,9 +32752,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32844,9 +32846,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32859,9 +32859,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32951,9 +32953,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32966,9 +32966,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33058,9 +33060,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33073,9 +33073,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33165,9 +33167,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33180,9 +33180,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33272,9 +33274,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33287,9 +33287,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33379,9 +33381,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33394,9 +33394,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33486,9 +33488,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33501,9 +33501,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33593,9 +33595,7 @@
                     "ifOutMulticastPkts": 284766,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33608,9 +33608,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33700,9 +33702,7 @@
                     "ifOutMulticastPkts": 284766,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33715,9 +33715,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33807,9 +33809,7 @@
                     "ifOutMulticastPkts": 284766,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33822,9 +33822,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33914,9 +33916,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33929,9 +33929,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34021,9 +34023,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34036,9 +34036,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34128,9 +34130,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34143,9 +34143,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34235,9 +34237,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34250,9 +34250,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34342,9 +34344,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34357,9 +34357,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34449,9 +34451,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34464,9 +34464,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34556,9 +34558,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34571,9 +34571,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34663,9 +34665,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34678,9 +34678,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34770,9 +34772,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34785,9 +34785,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34877,9 +34879,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34892,9 +34892,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34984,9 +34986,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34999,9 +34999,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35091,9 +35093,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35106,9 +35106,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35198,9 +35200,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35213,9 +35213,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35305,9 +35307,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35320,9 +35320,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35412,9 +35414,7 @@
                     "ifOutMulticastPkts": 388578,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35427,9 +35427,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35519,9 +35521,7 @@
                     "ifOutMulticastPkts": 77999,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35534,9 +35534,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35626,9 +35628,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35641,9 +35641,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35733,9 +35735,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35748,9 +35748,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35840,9 +35842,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35855,9 +35855,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35947,9 +35949,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35962,9 +35962,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36054,9 +36056,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36069,9 +36069,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36161,9 +36163,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36176,9 +36176,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36268,9 +36270,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36283,9 +36283,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36375,9 +36377,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36390,9 +36390,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36482,9 +36484,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36497,9 +36497,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36589,9 +36591,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36604,9 +36604,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36696,9 +36698,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36711,9 +36711,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36803,9 +36805,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36818,9 +36818,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36910,9 +36912,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36925,9 +36925,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37017,9 +37019,7 @@
                     "ifOutMulticastPkts": 36156940,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37032,9 +37032,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37124,9 +37126,7 @@
                     "ifOutMulticastPkts": 34484081,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37139,9 +37139,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37231,9 +37233,7 @@
                     "ifOutMulticastPkts": 34885579,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37246,9 +37246,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37338,9 +37340,7 @@
                     "ifOutMulticastPkts": 34405531,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37353,9 +37353,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37445,9 +37447,7 @@
                     "ifOutMulticastPkts": 34451319,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37460,9 +37460,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37552,9 +37554,7 @@
                     "ifOutMulticastPkts": 34240701,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37567,9 +37567,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37659,9 +37661,7 @@
                     "ifOutMulticastPkts": 34506016,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37674,9 +37674,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37766,9 +37768,7 @@
                     "ifOutMulticastPkts": 34425289,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37781,9 +37781,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37873,9 +37875,7 @@
                     "ifOutMulticastPkts": 34450444,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37888,9 +37888,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37980,9 +37982,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37995,9 +37995,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38087,9 +38089,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38102,9 +38102,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38194,9 +38196,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38209,9 +38209,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38301,9 +38303,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38316,9 +38316,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38408,9 +38410,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38423,9 +38423,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38515,9 +38517,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38530,9 +38530,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38622,9 +38624,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38637,9 +38637,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38729,9 +38731,7 @@
                     "ifOutMulticastPkts": 1782949,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38744,9 +38744,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38836,9 +38838,7 @@
                     "ifOutMulticastPkts": 198088,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38851,9 +38851,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38943,9 +38945,7 @@
                     "ifOutMulticastPkts": 284772,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38958,9 +38958,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39050,9 +39052,7 @@
                     "ifOutMulticastPkts": 33943930,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39065,9 +39065,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39157,9 +39159,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39172,9 +39172,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39264,9 +39266,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39279,9 +39279,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39371,9 +39373,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39386,9 +39386,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39478,9 +39480,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39493,9 +39493,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39585,9 +39587,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39600,9 +39600,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39692,9 +39694,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39707,9 +39707,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39799,9 +39801,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39814,9 +39814,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39906,9 +39908,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39921,9 +39921,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40013,9 +40015,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40028,9 +40028,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40120,9 +40122,7 @@
                     "ifOutMulticastPkts": 21,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40135,9 +40135,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40227,9 +40229,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40242,9 +40242,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40334,9 +40336,7 @@
                     "ifOutMulticastPkts": 58,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40349,9 +40349,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40441,9 +40443,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40456,9 +40456,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40548,9 +40550,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40563,9 +40563,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40655,9 +40657,7 @@
                     "ifOutMulticastPkts": 53985,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40670,9 +40670,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40762,9 +40764,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40777,9 +40777,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40869,9 +40871,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40884,9 +40884,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40976,9 +40978,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40991,9 +40991,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41083,9 +41085,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41098,9 +41098,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41190,9 +41192,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41205,9 +41205,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41297,9 +41299,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41312,9 +41312,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41404,9 +41406,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41419,9 +41419,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41511,9 +41513,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41526,9 +41526,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41618,9 +41620,7 @@
                     "ifOutMulticastPkts": 37648825,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41633,9 +41633,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41725,9 +41727,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41740,9 +41740,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41832,9 +41834,7 @@
                     "ifOutMulticastPkts": 34373971,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41847,9 +41847,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41939,9 +41941,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41954,9 +41954,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42046,9 +42048,7 @@
                     "ifOutMulticastPkts": 34373919,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42061,9 +42061,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42153,9 +42155,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42168,9 +42168,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42260,9 +42262,7 @@
                     "ifOutMulticastPkts": 34076180,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42275,9 +42275,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42367,9 +42369,7 @@
                     "ifOutMulticastPkts": 34374282,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42382,9 +42382,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42474,9 +42476,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42489,9 +42489,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42581,9 +42583,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42596,9 +42596,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42688,9 +42690,7 @@
                     "ifOutMulticastPkts": 34204045,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42703,9 +42703,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42795,9 +42797,7 @@
                     "ifOutMulticastPkts": 34301880,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42810,9 +42810,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42902,9 +42904,7 @@
                     "ifOutMulticastPkts": 12763194,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42917,9 +42917,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43009,9 +43011,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43024,9 +43024,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43116,9 +43118,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43131,9 +43131,11 @@
                     "portName": null,
                     "ifIndex": 171,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43223,9 +43225,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43238,9 +43238,11 @@
                     "portName": null,
                     "ifIndex": 172,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43330,9 +43332,7 @@
                     "ifOutMulticastPkts": 34371796,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43345,9 +43345,11 @@
                     "portName": null,
                     "ifIndex": 173,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43437,9 +43439,7 @@
                     "ifOutMulticastPkts": 34358892,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43452,9 +43452,11 @@
                     "portName": null,
                     "ifIndex": 174,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43544,9 +43546,7 @@
                     "ifOutMulticastPkts": 34368606,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43559,9 +43559,11 @@
                     "portName": null,
                     "ifIndex": 175,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43651,9 +43653,7 @@
                     "ifOutMulticastPkts": 34361651,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43666,9 +43666,11 @@
                     "portName": null,
                     "ifIndex": 176,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43758,9 +43760,7 @@
                     "ifOutMulticastPkts": 34361309,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43773,9 +43773,11 @@
                     "portName": null,
                     "ifIndex": 177,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43865,9 +43867,7 @@
                     "ifOutMulticastPkts": 30090826,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43880,9 +43880,11 @@
                     "portName": null,
                     "ifIndex": 178,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43972,9 +43974,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43987,9 +43987,11 @@
                     "portName": null,
                     "ifIndex": 179,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44079,9 +44081,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44094,9 +44094,11 @@
                     "portName": null,
                     "ifIndex": 180,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44186,9 +44188,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44201,9 +44201,11 @@
                     "portName": null,
                     "ifIndex": 181,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44293,9 +44295,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44308,9 +44308,11 @@
                     "portName": null,
                     "ifIndex": 182,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44400,9 +44402,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44415,9 +44415,11 @@
                     "portName": null,
                     "ifIndex": 183,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44507,9 +44509,7 @@
                     "ifOutMulticastPkts": 15240,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44522,9 +44522,11 @@
                     "portName": null,
                     "ifIndex": 184,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44614,9 +44616,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44629,9 +44629,11 @@
                     "portName": null,
                     "ifIndex": 185,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44721,9 +44723,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44736,9 +44736,11 @@
                     "portName": null,
                     "ifIndex": 186,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44828,9 +44830,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44843,9 +44843,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44935,9 +44937,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44950,9 +44950,11 @@
                     "portName": null,
                     "ifIndex": 188,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45042,9 +45044,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45057,9 +45057,11 @@
                     "portName": null,
                     "ifIndex": 189,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45149,9 +45151,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45164,9 +45164,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45256,9 +45258,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45271,9 +45271,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45363,9 +45365,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45378,9 +45378,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45470,9 +45472,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45485,9 +45485,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45577,9 +45579,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45592,9 +45592,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45684,9 +45686,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45699,9 +45699,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45791,9 +45793,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45806,9 +45806,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45898,9 +45900,7 @@
                     "ifOutMulticastPkts": 41259751,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45913,9 +45913,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46005,9 +46007,7 @@
                     "ifOutMulticastPkts": 41759913,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46020,9 +46020,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46112,9 +46114,7 @@
                     "ifOutMulticastPkts": 41455601,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46127,9 +46127,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46219,9 +46221,7 @@
                     "ifOutMulticastPkts": 41230444,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46234,9 +46234,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46326,9 +46328,7 @@
                     "ifOutMulticastPkts": 41991506,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46341,9 +46341,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46433,9 +46435,7 @@
                     "ifOutMulticastPkts": 41292813,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46448,9 +46448,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46540,9 +46542,7 @@
                     "ifOutMulticastPkts": 40409774,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46555,9 +46555,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46647,9 +46649,7 @@
                     "ifOutMulticastPkts": 41121631,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46662,9 +46662,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46754,9 +46756,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46769,9 +46769,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46861,9 +46863,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46876,9 +46876,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46968,9 +46970,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46983,9 +46983,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47075,9 +47077,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47090,9 +47090,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47182,9 +47184,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47197,9 +47197,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47289,9 +47291,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47304,9 +47304,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47396,9 +47398,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47411,9 +47411,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47503,9 +47505,7 @@
                     "ifOutMulticastPkts": 17329540,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47518,9 +47518,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47610,9 +47612,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47625,9 +47625,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47717,9 +47719,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47732,9 +47732,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47824,9 +47826,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47839,9 +47839,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47931,9 +47933,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47946,9 +47946,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48038,9 +48040,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48053,9 +48053,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48145,9 +48147,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48160,9 +48160,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48252,9 +48254,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48267,9 +48267,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48359,9 +48361,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48374,9 +48374,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48466,9 +48468,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48481,9 +48481,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48573,9 +48575,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48588,9 +48588,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48680,9 +48682,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48695,9 +48695,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48787,9 +48789,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48802,9 +48802,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": 3000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 3000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48894,9 +48896,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48909,9 +48909,11 @@
                     "portName": null,
                     "ifIndex": 233,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49001,9 +49003,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49016,9 +49016,11 @@
                     "portName": null,
                     "ifIndex": 234,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49108,9 +49110,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49123,9 +49123,11 @@
                     "portName": null,
                     "ifIndex": 235,
                     "ifSpeed": 5000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 5000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49215,9 +49217,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49230,9 +49230,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49322,9 +49324,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49337,9 +49337,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49429,9 +49431,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49444,9 +49444,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49536,9 +49538,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49551,9 +49551,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49643,9 +49645,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49658,9 +49658,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49750,9 +49752,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -51859,5 +51859,246 @@
                 }
             ]
         }
+    },
+    "mempools": {
+        "discovery": {
+            "mempools": []
+        },
+        "poller": {
+            "mempools": []
+        }
+    },
+    "sensors": {
+        "discovery": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.1.1.2.0",
+                    "sensor_index": "0",
+                    "sensor_type": "hh3cdevMFanStatusTable",
+                    "sensor_descr": "Fan 0",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMFanStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.0",
+                    "sensor_index": "0",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 0",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.1",
+                    "sensor_index": "1",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.2",
+                    "sensor_index": "2",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 2",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.3",
+                    "sensor_index": "3",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 3",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.4",
+                    "sensor_index": "4",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 4",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.5",
+                    "sensor_index": "5",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 5",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "active",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "deactive",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "not-install",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "unsupport",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "active",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "deactive",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "not-install",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "unsupport",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                }
+            ]
+        },
+        "poller": "matches discovery"
     }
 }
diff --git a/tests/data/comware_a5500.json b/tests/data/comware_a5500.json
index d46d361363..df5a4c4fa9 100644
--- a/tests/data/comware_a5500.json
+++ b/tests/data/comware_a5500.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 6521,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 6511,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 6516,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 6510,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 6302,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 8337,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 5202,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 8372,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 6389,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 6410,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 6570,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 6569,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 6583,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 6555,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 42724,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 80240,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 6486,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 80110,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 6327,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 6548,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 6541,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 6578,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 3032,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 1274,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -7114,5 +7114,150 @@
                 }
             ]
         }
+    },
+    "mempools": {
+        "discovery": {
+            "mempools": []
+        },
+        "poller": {
+            "mempools": []
+        }
+    },
+    "sensors": {
+        "discovery": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.1.1.2.1",
+                    "sensor_index": "1",
+                    "sensor_type": "hh3cdevMFanStatusTable",
+                    "sensor_descr": "Fan 1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMFanStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.1",
+                    "sensor_index": "1",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.25506.8.35.9.1.2.1.2.2",
+                    "sensor_index": "2",
+                    "sensor_type": "hh3cdevMPowerStatusTable",
+                    "sensor_descr": "Power Supply 2",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hh3cdevMPowerStatusTable"
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "active",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "deactive",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "not-install",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "hh3cdevMFanStatusTable",
+                    "state_descr": "unsupport",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "active",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "deactive",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "not-install",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "hh3cdevMPowerStatusTable",
+                    "state_descr": "unsupport",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                }
+            ]
+        },
+        "poller": "matches discovery"
     }
 }
diff --git a/tests/data/cumulus_edgecore-as4610-54p.json b/tests/data/cumulus_edgecore-as4610-54p.json
index 2da7c3c547..d17af020eb 100644
--- a/tests/data/cumulus_edgecore-as4610-54p.json
+++ b/tests/data/cumulus_edgecore-as4610-54p.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -12419,7 +12419,7 @@
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
                     "sensor_current": 6026,
-                    "sensor_limit": 10846.800000000001,
+                    "sensor_limit": 10846.8,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": 4820.8,
                     "sensor_limit_low_warn": null,
diff --git a/tests/data/cxr-ts.json b/tests/data/cxr-ts.json
index a3e3ce98a0..6976c1aa59 100644
--- a/tests/data/cxr-ts.json
+++ b/tests/data/cxr-ts.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 1, vt100, rtelnet, b9600 p8none1, alias ip",
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": 9600,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 2, vt100, rtelnet, b9600 p8none1, alias ip",
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1002,
                     "ifSpeed": 9600,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": 19200,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/cyberoam-utm.json b/tests/data/cyberoam-utm.json
index fab0a57d75..310d2804b5 100644
--- a/tests/data/cyberoam-utm.json
+++ b/tests/data/cyberoam-utm.json
@@ -69,9 +69,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -161,9 +163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -176,9 +176,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -268,9 +270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -283,9 +283,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -375,9 +377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -390,9 +390,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -482,9 +484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -497,9 +497,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -589,9 +591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -604,9 +604,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -696,9 +698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -711,9 +711,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -803,9 +805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -818,9 +818,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -910,9 +912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -925,9 +925,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1017,9 +1019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1032,9 +1032,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1124,9 +1126,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1139,9 +1139,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1231,9 +1233,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1246,9 +1246,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1338,9 +1340,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1353,9 +1353,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1445,9 +1447,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1460,9 +1460,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1552,9 +1554,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1567,9 +1567,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1659,9 +1661,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1674,9 +1674,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1766,9 +1768,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1781,9 +1781,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1873,9 +1875,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1888,9 +1888,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1980,9 +1982,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1995,9 +1995,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2087,9 +2089,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2102,9 +2102,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2194,9 +2196,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2209,9 +2209,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2301,9 +2303,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2316,9 +2316,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2408,9 +2410,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2423,9 +2423,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2515,9 +2517,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2530,9 +2530,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2622,9 +2624,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2637,9 +2637,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2729,9 +2731,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2744,9 +2744,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2836,9 +2838,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2851,9 +2851,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2943,9 +2945,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2958,9 +2958,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3050,9 +3052,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3069,9 +3069,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3161,9 +3163,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3176,9 +3176,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3268,9 +3270,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3283,9 +3283,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3375,9 +3377,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3390,9 +3390,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3482,9 +3484,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3497,9 +3497,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3589,9 +3591,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3604,9 +3604,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3696,9 +3698,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3711,9 +3711,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1316134912,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3803,9 +3805,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3818,9 +3818,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1316134912,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3910,9 +3912,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3925,9 +3925,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4017,9 +4019,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4032,9 +4032,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4124,9 +4126,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4139,9 +4139,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4231,9 +4233,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4246,9 +4246,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4338,9 +4340,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4353,9 +4353,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4445,9 +4447,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4460,9 +4460,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4552,9 +4554,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4567,9 +4567,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4659,9 +4661,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4674,9 +4674,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4766,9 +4768,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4781,9 +4781,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4873,9 +4875,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4888,9 +4888,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4980,9 +4982,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4995,9 +4995,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5087,9 +5089,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5102,9 +5102,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5194,9 +5196,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5209,9 +5209,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5301,9 +5303,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5316,9 +5316,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5408,9 +5410,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5423,9 +5423,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5515,9 +5517,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5530,9 +5530,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5622,9 +5624,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5637,9 +5637,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5729,9 +5731,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5744,9 +5744,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5836,9 +5838,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5851,9 +5851,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5943,9 +5945,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5958,9 +5958,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6050,9 +6052,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dahua-nvr.json b/tests/data/dahua-nvr.json
index 811dc0b975..f5692f5a43 100644
--- a/tests/data/dahua-nvr.json
+++ b/tests/data/dahua-nvr.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dell-laser_s5830dn.json b/tests/data/dell-laser_s5830dn.json
index cb3a25a3e8..42f6ab0efb 100644
--- a/tests/data/dell-laser_s5830dn.json
+++ b/tests/data/dell-laser_s5830dn.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dell-os10.json b/tests/data/dell-os10.json
index b67c7e69cd..97232ea04d 100644
--- a/tests/data/dell-os10.json
+++ b/tests/data/dell-os10.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 266,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 267,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 591,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 593,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 593,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 591,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 200000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 200000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 533,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dell-rpdu.json b/tests/data/dell-rpdu.json
index 8c5cc2f097..b2f3434f91 100644
--- a/tests/data/dell-rpdu.json
+++ b/tests/data/dell-rpdu.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dell-ups_rack3750w.json b/tests/data/dell-ups_rack3750w.json
index 4fe664a4e1..6725dd88b3 100644
--- a/tests/data/dell-ups_rack3750w.json
+++ b/tests/data/dell-ups_rack3750w.json
@@ -25,9 +25,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -117,9 +119,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -132,9 +132,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -224,9 +226,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -243,9 +243,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -335,9 +337,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -350,9 +350,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -442,9 +444,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -531,7 +531,7 @@
                     "group": null,
                     "sensor_divisor": 60,
                     "sensor_multiplier": 1,
-                    "sensor_current": 186.31666666666666,
+                    "sensor_current": 186.31666666667,
                     "sensor_limit": 3000,
                     "sensor_limit_warn": 2000,
                     "sensor_limit_low": 5,
@@ -614,6 +614,125 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "power",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.120.2.6.0",
+                    "sensor_index": "0",
+                    "sensor_type": "dell-ups",
+                    "sensor_descr": "System Consumption",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 307,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "runtime",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.120.5.3.0",
+                    "sensor_index": "0",
+                    "sensor_type": "dell-ups",
+                    "sensor_descr": "Runtime",
+                    "group": null,
+                    "sensor_divisor": 60,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 186.31666666667,
+                    "sensor_limit": 3000,
+                    "sensor_limit_warn": 2000,
+                    "sensor_limit_low": 5,
+                    "sensor_limit_low_warn": 10,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": 186.31666666667,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.110.1.0",
+                    "sensor_index": "0",
+                    "sensor_type": "productStatusGlobalStatus",
+                    "sensor_descr": "Current Status",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "productStatusGlobalStatus"
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "other",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "ok",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "non-critical",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "critical",
+                    "state_draw_graph": 1,
+                    "state_value": 5,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "non-recoverable",
+                    "state_draw_graph": 1,
+                    "state_value": 6,
+                    "state_generic_value": 2
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/dell-ups_tower1000w.json b/tests/data/dell-ups_tower1000w.json
index 587b5164e4..3d80024c73 100644
--- a/tests/data/dell-ups_tower1000w.json
+++ b/tests/data/dell-ups_tower1000w.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -801,7 +801,7 @@
                     "group": null,
                     "sensor_divisor": 60,
                     "sensor_multiplier": 1,
-                    "sensor_current": 31.483333333333334,
+                    "sensor_current": 31.483333333333,
                     "sensor_limit": 3000,
                     "sensor_limit_warn": 2000,
                     "sensor_limit_low": 5,
@@ -1177,6 +1177,706 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "charge",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.4.0",
+                    "sensor_index": "500",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Battery charge remaining",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 98,
+                    "sensor_limit": 101,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 15,
+                    "sensor_limit_low_warn": 50,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.4.1.3.1",
+                    "sensor_index": "1",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Output",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1.1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.3.3.1.4.1",
+                    "sensor_index": "101",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Input",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.5.3.1.3.1",
+                    "sensor_index": "201",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Bypass",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.6.0",
+                    "sensor_index": "500",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Battery",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "frequency",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.3.3.1.2.1",
+                    "sensor_index": "3.2.0.1",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Input",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 49.9,
+                    "sensor_limit": 52.395,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 47.405,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "frequency",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.2.0",
+                    "sensor_index": "4.2.0",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Output",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 49.9,
+                    "sensor_limit": 52.395,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 47.405,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "frequency",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.5.1.0",
+                    "sensor_index": "5.1.0",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Bypass",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": 0,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 0,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "load",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.4.1.5.1",
+                    "sensor_index": "501",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Percentage load",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 26,
+                    "sensor_limit": 80,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "power",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.120.2.6.0",
+                    "sensor_index": "0",
+                    "sensor_type": "dell-ups",
+                    "sensor_descr": "System Consumption",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 250,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "power",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.3.3.1.5.1",
+                    "sensor_index": "101",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Input",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "power",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.5.3.1.4.1",
+                    "sensor_index": "201",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Bypass",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "power",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.4.1.4.1",
+                    "sensor_index": "301",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Output",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 250,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
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+                    "sensor_class": "runtime",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.120.5.3.0",
+                    "sensor_index": "0",
+                    "sensor_type": "dell-ups",
+                    "sensor_descr": "Runtime",
+                    "group": null,
+                    "sensor_divisor": 60,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 31.483333333333,
+                    "sensor_limit": 3000,
+                    "sensor_limit_warn": 2000,
+                    "sensor_limit_low": 5,
+                    "sensor_limit_low_warn": 10,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": 31.483333333333,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "runtime",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.2.0",
+                    "sensor_index": "100",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Time on battery",
+                    "group": null,
+                    "sensor_divisor": 60,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": 2,
+                    "sensor_limit_warn": 1,
+                    "sensor_limit_low": 0,
+                    "sensor_limit_low_warn": 0,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "runtime",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.3.0",
+                    "sensor_index": "200",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Estimated battery time remaining",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 31,
+                    "sensor_limit": 10000,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 5,
+                    "sensor_limit_low_warn": 10,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.674.10902.2.110.1.0",
+                    "sensor_index": "0",
+                    "sensor_type": "productStatusGlobalStatus",
+                    "sensor_descr": "Current Status",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "productStatusGlobalStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.1.0",
+                    "sensor_index": "0",
+                    "sensor_type": "upsBatteryStatusState",
+                    "sensor_descr": "Battery Status",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 2,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "0",
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "upsBatteryStatusState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.1.0",
+                    "sensor_index": "0",
+                    "sensor_type": "upsOutputSourceState",
+                    "sensor_descr": "Output Source",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "0",
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "upsOutputSourceState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.7.0",
+                    "sensor_index": "0",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Battery",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": 20,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": -10,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.4.4.1.2.1",
+                    "sensor_index": "1",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Output",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 233,
+                    "sensor_limit": 267.95,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 198.05,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.2.5.0",
+                    "sensor_index": "1.2.5.0",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Battery",
+                    "group": null,
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 38,
+                    "sensor_limit": 43.7,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 32.3,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.3.3.1.3.1",
+                    "sensor_index": "101",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Input",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 232,
+                    "sensor_limit": 266.8,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 197.2,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.2.1.33.1.5.3.1.2.1",
+                    "sensor_index": "201",
+                    "sensor_type": "rfc1628",
+                    "sensor_descr": "Bypass",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": 0,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 0,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "other",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "ok",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "non-critical",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "critical",
+                    "state_draw_graph": 1,
+                    "state_value": 5,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "productStatusGlobalStatus",
+                    "state_descr": "non-recoverable",
+                    "state_draw_graph": 1,
+                    "state_value": 6,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "upsBatteryStatusState",
+                    "state_descr": "Unknown",
+                    "state_draw_graph": 0,
+                    "state_value": 1,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "upsBatteryStatusState",
+                    "state_descr": "Normal",
+                    "state_draw_graph": 0,
+                    "state_value": 2,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "upsBatteryStatusState",
+                    "state_descr": "Low",
+                    "state_draw_graph": 0,
+                    "state_value": 3,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "upsBatteryStatusState",
+                    "state_descr": "Depleted",
+                    "state_draw_graph": 0,
+                    "state_value": 4,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Other",
+                    "state_draw_graph": 0,
+                    "state_value": 1,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "None",
+                    "state_draw_graph": 0,
+                    "state_value": 2,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Normal",
+                    "state_draw_graph": 0,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Bypass",
+                    "state_draw_graph": 0,
+                    "state_value": 4,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Battery",
+                    "state_draw_graph": 0,
+                    "state_value": 5,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Booster",
+                    "state_draw_graph": 0,
+                    "state_value": 6,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "upsOutputSourceState",
+                    "state_descr": "Reducer",
+                    "state_draw_graph": 0,
+                    "state_value": 7,
+                    "state_generic_value": 2
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/deltaups.json b/tests/data/deltaups.json
index e6dde2ab02..137253debc 100644
--- a/tests/data/deltaups.json
+++ b/tests/data/deltaups.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_des-3526.json b/tests/data/dlink_des-3526.json
index e10f8c861b..e4d3e8a7f6 100644
--- a/tests/data/dlink_des-3526.json
+++ b/tests/data/dlink_des-3526.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 5120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 2922469,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 52566,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 1756934,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 2406503,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 8780054,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 115129,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 1280096,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 9126728,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 1841755,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 23265374,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_des-3528.json b/tests/data/dlink_des-3528.json
index e255adf2ce..7b5dd229a1 100644
--- a/tests/data/dlink_des-3528.json
+++ b/tests/data/dlink_des-3528.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 77775,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 79992,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 125934,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 67391,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 66874,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 161364,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 124441,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 152130,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 119771,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 88449,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 74288,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 154721,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 77737,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 111907,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 112259,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 105890,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 150224,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 102426,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 137285,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 74441,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 159663,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 70425,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 67635,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_des-3550.json b/tests/data/dlink_des-3550.json
index 120c13976a..2369442ea7 100644
--- a/tests/data/dlink_des-3550.json
+++ b/tests/data/dlink_des-3550.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 3024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 4173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 4994,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 5120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 3024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 4173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 4994,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 5120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-1510-28.json b/tests/data/dlink_dgs-1510-28.json
index bacc4f038d..b2e7088793 100644
--- a/tests/data/dlink_dgs-1510-28.json
+++ b/tests/data/dlink_dgs-1510-28.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1234,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1453,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 2013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 2014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 3034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 40000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 5210089879,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 395022,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 719656,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 793965,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 805314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 1471913853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 1533798,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 1234,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 1453,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 2013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 2014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 3034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "d-link corporation dgs-1510-28 hw a1 firmware 1.50.021 rif0",
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 40000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-1510-28x-me.json b/tests/data/dlink_dgs-1510-28x-me.json
index 6485053b4c..970f1f038c 100644
--- a/tests/data/dlink_dgs-1510-28x-me.json
+++ b/tests/data/dlink_dgs-1510-28x-me.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 1378210,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 1361097,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-1510-28xmp-me.json b/tests/data/dlink_dgs-1510-28xmp-me.json
index 318c68f423..0628d53510 100644
--- a/tests/data/dlink_dgs-1510-28xmp-me.json
+++ b/tests/data/dlink_dgs-1510-28xmp-me.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 256652,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 1412220,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 1323360,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 1657536,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 494262,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 494256,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 494263,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 494264,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 494251,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 241103,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3000-28x.json b/tests/data/dlink_dgs-3000-28x.json
index 1a0c6e747c..100ec8b7d5 100644
--- a/tests/data/dlink_dgs-3000-28x.json
+++ b/tests/data/dlink_dgs-3000-28x.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 12641618,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3000-28xmp.json b/tests/data/dlink_dgs-3000-28xmp.json
index 998514f0cc..499444a358 100644
--- a/tests/data/dlink_dgs-3000-28xmp.json
+++ b/tests/data/dlink_dgs-3000-28xmp.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4997,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 1004335,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 1004420,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 1004349,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 1004221,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 1004253,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 1004170,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 1004168,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 1004280,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 1004229,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 1004260,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 1004156,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 1004326,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 1004324,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 1004338,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 1004223,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 1004174,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 1004070,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 1004141,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 1004245,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 1004109,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 1004072,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 1004078,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 406336,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 4181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 4997,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3120-24tc.json b/tests/data/dlink_dgs-3120-24tc.json
index 5aeb8a6348..009692873d 100644
--- a/tests/data/dlink_dgs-3120-24tc.json
+++ b/tests/data/dlink_dgs-3120-24tc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 6,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 25,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 40,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3420-28tc.json b/tests/data/dlink_dgs-3420-28tc.json
index abbcad89bb..33031a1746 100644
--- a/tests/data/dlink_dgs-3420-28tc.json
+++ b/tests/data/dlink_dgs-3420-28tc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 1048877,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 1008800,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 135621,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 834194,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 150362,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 1907299,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3620-28sc.json b/tests/data/dlink_dgs-3620-28sc.json
index f872580be7..b8fd5c178f 100644
--- a/tests/data/dlink_dgs-3620-28sc.json
+++ b/tests/data/dlink_dgs-3620-28sc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 2025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 5122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 5123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 5124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 5125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 7169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 131740377860,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 131832748981,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 131809202701,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 131820327472,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 131840632342,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 131964561823,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 320426604,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 2992953,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 3905365,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 51217395399,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 2025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 4189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif1",
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 5122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif2",
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 5123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif3",
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 5124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif4",
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 5125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "loopback0",
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 7169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dlink_dgs-3627g.json b/tests/data/dlink_dgs-3627g.json
index 41bbae07c0..5a6a374470 100644
--- a/tests/data/dlink_dgs-3627g.json
+++ b/tests/data/dlink_dgs-3627g.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 2025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4994,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 5122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 5123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 5124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 5125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 7169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 24930457,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 23648978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 23324545,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 21804812,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 23137901,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 22930392,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 21838989,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 24604765,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 24416294,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 24151526,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 24674429,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 24758139,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 23430624,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 24878901,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 24740732,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 24583030,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 668597,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 1024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 2025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 3025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 4063,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 4994,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 4995,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 5025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 5026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif0",
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 5121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif1",
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 5122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif2",
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 5123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif3",
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 5124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "rif4",
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 5125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "loopback256",
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 7169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dnos.json b/tests/data/dnos.json
index 0668a3b8fc..1f30cb23ac 100644
--- a/tests/data/dnos.json
+++ b/tests/data/dnos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1048580,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 1048708,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 1048836,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 1048964,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 1049092,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 1049220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 1049348,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 1049476,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 1049604,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 1049732,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 1049860,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 1049988,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 1050116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 1050244,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 1050372,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 1050500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 1050628,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 1050756,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 1050884,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 1051012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 1051140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 1051268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 1051396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 1051524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 1051652,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 1051780,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 1051908,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 1052036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1052164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1052292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1052420,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 1052548,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 1052677,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 1053189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 1053701,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 1054213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 1054724,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 1054852,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 1054980,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 1055108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 2097156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 2097284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4545,9 +4545,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifOperStatus": "down",
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@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4652,9 +4652,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -4744,9 +4746,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4759,9 +4759,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -4851,9 +4853,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4866,9 +4866,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -4958,9 +4960,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4973,9 +4973,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5065,9 +5067,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5080,9 +5080,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "down",
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@@ -5172,9 +5174,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5187,9 +5187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5279,9 +5281,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5294,9 +5294,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5386,9 +5388,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5401,9 +5401,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5493,9 +5495,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5508,9 +5508,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -5600,9 +5602,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5615,9 +5615,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
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@@ -5707,9 +5709,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5722,9 +5722,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -5814,9 +5816,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5829,9 +5829,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -5921,9 +5923,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5936,9 +5936,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -6028,9 +6030,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6043,9 +6043,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -6135,9 +6137,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6150,9 +6150,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -6242,9 +6244,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6349,9 +6351,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6456,9 +6458,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6563,9 +6565,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 2100100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 2100228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 2100484,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 2100612,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 2100996,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 2101124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7740,9 +7742,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7755,9 +7755,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -7847,9 +7849,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7862,9 +7862,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -7954,9 +7956,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7969,9 +7969,11 @@
                     "portName": null,
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@@ -8061,9 +8063,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8076,9 +8076,11 @@
                     "portName": null,
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@@ -8168,9 +8170,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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@@ -8183,9 +8183,11 @@
                     "portName": null,
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@@ -8275,9 +8277,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8290,9 +8290,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -8382,9 +8384,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8397,9 +8397,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -8489,9 +8491,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8504,9 +8504,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -8596,9 +8598,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8611,9 +8611,11 @@
                     "portName": null,
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@@ -8703,9 +8705,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8718,9 +8718,11 @@
                     "portName": null,
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@@ -8810,9 +8812,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8825,9 +8825,11 @@
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@@ -8917,9 +8919,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8932,9 +8932,11 @@
                     "portName": null,
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@@ -9024,9 +9026,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9039,9 +9039,11 @@
                     "portName": null,
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@@ -9131,9 +9133,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9146,9 +9146,11 @@
                     "portName": null,
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@@ -9238,9 +9240,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9253,9 +9253,11 @@
                     "portName": null,
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@@ -9345,9 +9347,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9360,9 +9360,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -9452,9 +9454,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9467,9 +9467,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -9559,9 +9561,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9574,9 +9574,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -9666,9 +9668,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9681,9 +9681,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9773,9 +9775,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9880,9 +9882,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9987,9 +9989,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10094,9 +10096,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -10201,9 +10203,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -10308,9 +10310,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10323,9 +10323,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10415,9 +10417,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10430,9 +10430,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -10522,9 +10524,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -10629,9 +10631,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -10736,9 +10738,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10858,9 +10858,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -10950,9 +10952,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10965,9 +10965,11 @@
                     "portName": null,
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@@ -11057,9 +11059,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11072,9 +11072,11 @@
                     "portName": null,
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@@ -11164,9 +11166,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11179,9 +11179,11 @@
                     "portName": null,
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@@ -11271,9 +11273,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11286,9 +11286,11 @@
                     "portName": null,
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@@ -11378,9 +11380,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11393,9 +11393,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -11485,9 +11487,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11500,9 +11500,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -11592,9 +11594,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11607,9 +11607,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -11699,9 +11701,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11714,9 +11714,11 @@
                     "portName": null,
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@@ -11806,9 +11808,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11821,9 +11821,11 @@
                     "portName": null,
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@@ -11913,9 +11915,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11928,9 +11928,11 @@
                     "portName": null,
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@@ -12020,9 +12022,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12035,9 +12035,11 @@
                     "portName": null,
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@@ -12127,9 +12129,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12142,9 +12142,11 @@
                     "portName": null,
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@@ -12234,9 +12236,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12249,9 +12249,11 @@
                     "portName": null,
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@@ -12341,9 +12343,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12356,9 +12356,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -12448,9 +12450,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12463,9 +12463,11 @@
                     "portName": null,
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@@ -12555,9 +12557,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12570,9 +12570,11 @@
                     "portName": null,
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@@ -12662,9 +12664,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12677,9 +12677,11 @@
                     "portName": null,
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@@ -12769,9 +12771,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -12876,9 +12878,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -12983,9 +12985,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -13090,9 +13092,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 1048580,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -13629,9 +13631,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14179,9 +14179,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14286,9 +14286,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -14393,9 +14393,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 1050244,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 1050372,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 109901292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 1050500,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 1050628,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 1050756,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 1050884,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 1051012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 1051140,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 1051268,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 1051396,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 1051524,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 1051652,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 1051780,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 1051908,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 1052036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 1052164,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 1052292,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 1052420,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 1052548,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 1052677,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 127644530,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 1053189,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 1636853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 1053701,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 1054213,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 1054724,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 1054852,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 1054980,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 1055108,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 2097156,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 2097284,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 2097412,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 2097540,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 2097668,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 2097796,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 2097924,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 2098052,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 2098180,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 2098308,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 2098436,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 2098564,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 2098692,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 2098820,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 2098948,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 2099076,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 2099204,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 2099332,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 2099460,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 2099588,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 2099716,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 2099844,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 2099972,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 2100100,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 2100228,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 2100356,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 2100484,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 2100612,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 2100740,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 2100868,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 3019,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 2100996,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 2101124,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 2101252,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 2101380,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 2101508,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 2101636,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 2101764,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 2101892,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 2102020,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 2102148,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 2102276,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 2102404,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 2102532,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 2102660,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 2102788,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 2102916,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 2103044,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 2103172,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 2103301,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 3189443,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 2103813,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 2104325,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 2104837,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 2105349,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 15612806,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 2105861,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 8262412,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 7340033,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 9437185,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 1233125376,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 1258291712,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 109867832,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 1258292224,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 109898621,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 1258292736,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 109874987,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 1258293248,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 109883658,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 1258293760,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 109898521,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 1258294272,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 109898770,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 1258294784,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 109896458,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 1258295296,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 109898021,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 1258295808,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 109898760,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 1258296320,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 109897923,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 1258296832,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 109866211,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 1258297344,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 109861283,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 1258297856,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 109890774,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 1258298368,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 109896766,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 1258298880,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 109901292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 1258299392,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 109898023,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 1258308096,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 127644530,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 1258310144,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 1636853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 1258314240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 1258314752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 1258316288,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 3189443,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 1258318336,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 23875218,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 1275068928,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 1275119104,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 1275119616,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/dnos_s4048.json b/tests/data/dnos_s4048.json
index 522bd905de..606c258dee 100644
--- a/tests/data/dnos_s4048.json
+++ b/tests/data/dnos_s4048.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1048580,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 1048708,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 1048836,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 1048964,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 1049092,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 1049220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 1049348,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 1049476,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 1049604,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 1049732,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 1049860,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 1049988,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 1050116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 1050244,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 1050372,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 1050500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 1050628,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 1050756,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 1050884,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 1051012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 1051140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 1051268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 1051396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 1051524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 1051652,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 1051780,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 1051908,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 1052036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 1052164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1052292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1052420,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "down",
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@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 1052548,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -3460,9 +3462,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3475,9 +3475,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -3567,9 +3569,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3582,9 +3582,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "up",
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@@ -3674,9 +3676,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3689,9 +3689,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -3781,9 +3783,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3796,9 +3796,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3903,9 +3903,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -3995,9 +3997,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4010,9 +4010,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -4102,9 +4104,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4117,9 +4117,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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@@ -4209,9 +4211,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4224,9 +4224,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -4316,9 +4318,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4331,9 +4331,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -4423,9 +4425,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4438,9 +4438,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -4530,9 +4532,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4545,9 +4545,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -4637,9 +4639,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4652,9 +4652,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -4744,9 +4746,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4759,9 +4759,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -4851,9 +4853,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5172,9 +5174,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 2098180,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 2098181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 2098308,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 2098436,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 2098564,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 2098820,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6242,9 +6244,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6349,9 +6351,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6471,9 +6471,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -6563,9 +6565,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6578,9 +6578,11 @@
                     "portName": null,
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@@ -6670,9 +6672,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6685,9 +6685,11 @@
                     "portName": null,
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@@ -6777,9 +6779,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6792,9 +6792,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -6884,9 +6886,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6899,9 +6899,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -6991,9 +6993,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7006,9 +7006,11 @@
                     "portName": null,
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@@ -7098,9 +7100,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7113,9 +7113,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -7205,9 +7207,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7220,9 +7220,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -7312,9 +7314,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7327,9 +7327,11 @@
                     "portName": null,
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@@ -7419,9 +7421,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7434,9 +7434,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -7526,9 +7528,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7541,9 +7541,11 @@
                     "portName": null,
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@@ -7633,9 +7635,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7648,9 +7648,11 @@
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@@ -7740,9 +7742,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7755,9 +7755,11 @@
                     "portName": null,
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@@ -7847,9 +7849,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7862,9 +7862,11 @@
                     "portName": null,
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@@ -7954,9 +7956,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7969,9 +7969,11 @@
                     "portName": null,
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@@ -8061,9 +8063,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8076,9 +8076,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -8168,9 +8170,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8183,9 +8183,11 @@
                     "portName": null,
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@@ -8275,9 +8277,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8290,9 +8290,11 @@
                     "portName": null,
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@@ -8382,9 +8384,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8397,9 +8397,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -8489,9 +8491,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8504,9 +8504,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -8596,9 +8598,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8611,9 +8611,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
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@@ -8703,9 +8705,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8718,9 +8718,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
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@@ -8810,9 +8812,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8825,9 +8825,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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+                    "ifHighSpeed_prev": null,
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@@ -8917,9 +8919,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -9024,9 +9026,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -9131,9 +9133,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -9238,9 +9240,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9253,9 +9253,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9345,9 +9347,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9452,9 +9454,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9559,9 +9561,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
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                     "ifConnectorPresent": null,
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                     "ifOperStatus": "down",
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@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9681,9 +9681,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9773,9 +9775,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9788,9 +9788,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9880,9 +9882,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9895,9 +9895,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9987,9 +9989,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10002,9 +10002,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifOperStatus": "down",
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@@ -10094,9 +10096,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10109,9 +10109,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10201,9 +10203,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 2102788,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10308,9 +10310,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10415,9 +10417,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10522,9 +10524,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 2103044,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 2103172,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11072,9 +11072,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 2104334,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 2104837,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -11485,9 +11487,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 2104846,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 2105349,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 2105358,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 2105861,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 2105870,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 2106382,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 2106894,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 2107406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 2107918,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 2108421,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 2108933,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 2109454,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
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@@ -12769,9 +12771,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12784,9 +12784,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -12876,9 +12878,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12891,9 +12891,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -12983,9 +12985,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12998,9 +12998,11 @@
                     "portName": null,
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@@ -13090,9 +13092,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -13105,9 +13105,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -13197,9 +13199,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13212,9 +13212,11 @@
                     "portName": null,
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@@ -13304,9 +13306,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13319,9 +13319,11 @@
                     "portName": null,
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@@ -13411,9 +13413,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13426,9 +13426,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -13518,9 +13520,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13533,9 +13533,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -13625,9 +13627,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13640,9 +13640,11 @@
                     "portName": null,
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@@ -13732,9 +13734,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13747,9 +13747,11 @@
                     "portName": null,
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@@ -13839,9 +13841,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13854,9 +13854,11 @@
                     "portName": null,
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@@ -13946,9 +13948,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -13961,9 +13961,11 @@
                     "portName": null,
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@@ -14053,9 +14055,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -14068,9 +14068,11 @@
                     "portName": null,
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@@ -14160,9 +14162,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -14175,9 +14175,11 @@
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@@ -14267,9 +14269,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -14282,9 +14282,11 @@
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@@ -14374,9 +14376,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -14389,9 +14389,11 @@
                     "portName": null,
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@@ -14481,9 +14483,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14496,9 +14496,11 @@
                     "portName": null,
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@@ -14588,9 +14590,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14603,9 +14603,11 @@
                     "portName": null,
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@@ -14695,9 +14697,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14710,9 +14710,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -14802,9 +14804,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14817,9 +14817,11 @@
                     "portName": null,
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@@ -14909,9 +14911,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14924,9 +14924,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -15016,9 +15018,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15031,9 +15031,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -15123,9 +15125,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15138,9 +15138,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -15230,9 +15232,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15245,9 +15245,11 @@
                     "portName": null,
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@@ -15337,9 +15339,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15352,9 +15352,11 @@
                     "portName": null,
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@@ -15444,9 +15446,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15459,9 +15459,11 @@
                     "portName": null,
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@@ -15551,9 +15553,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15566,9 +15566,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -15658,9 +15660,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -15765,9 +15767,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15780,9 +15780,11 @@
                     "portName": null,
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@@ -15872,9 +15874,7 @@
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@@ -17813,9 +17813,11 @@
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@@ -17920,9 +17920,11 @@
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@@ -18027,9 +18027,11 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -18134,9 +18134,11 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -18241,9 +18241,11 @@
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@@ -18348,9 +18348,11 @@
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@@ -18440,9 +18442,7 @@
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-                    "ifHighSpeed_prev": null
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             ]
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@@ -18459,9 +18459,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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@@ -18551,9 +18553,7 @@
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                 {
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@@ -18566,9 +18566,11 @@
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                     "ifSpeed": 10000000000,
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@@ -18658,9 +18660,7 @@
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                 {
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@@ -18673,9 +18673,11 @@
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@@ -18765,9 +18767,7 @@
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                 {
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@@ -18780,9 +18780,11 @@
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@@ -18872,9 +18874,7 @@
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                 {
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@@ -18887,9 +18887,11 @@
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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@@ -18979,9 +18981,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -18994,9 +18994,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19086,9 +19088,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19101,9 +19101,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19208,9 +19208,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19315,9 +19315,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19407,9 +19409,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19422,9 +19422,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19514,9 +19516,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19529,9 +19529,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19621,9 +19623,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19728,9 +19730,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19835,9 +19837,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 1050244,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 109896766,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 1050372,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 109901292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 1050500,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 109898023,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 1050628,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 1050756,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 1050884,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 1051012,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 1051140,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 1051268,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 1051396,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 1051524,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 1051652,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 1051780,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 1051908,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 1052036,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 1052164,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 1052292,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 1052420,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 1052548,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 1052677,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 127644530,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 1053189,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 1636853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -22097,9 +22097,11 @@
                     "portName": null,
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                     "ifSpeed": 40000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -22204,9 +22204,11 @@
                     "portName": null,
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                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22296,9 +22298,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22403,9 +22405,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -22418,9 +22418,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 1054980,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22724,9 +22726,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 2097157,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 998104171,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23259,9 +23261,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
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                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 1010755327,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 2097924,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 2098052,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 2098180,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 2098181,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 997829341,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 2098308,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 2098436,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 2098564,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 2098692,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 2098693,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 1018417331,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 2098820,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 2098948,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 2099076,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 2099204,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 2099214,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 2099332,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 2099460,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 2099588,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 2099716,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 2099726,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 2099844,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 2099972,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 2100100,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 2100228,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 2100238,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 2100356,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 2100484,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 2100612,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 2100740,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 2100750,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 2100868,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 3019,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 2100996,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 2101124,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 2101252,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 2101262,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 2101380,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 2101508,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 2101636,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 2101764,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 2101774,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 2101892,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 2102020,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 2102148,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 2102276,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 2102286,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 2102404,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 2102532,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 2102660,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 2102788,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 2102798,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 2102916,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 2103044,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 2103172,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 2103301,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 3189443,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 2103310,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 2103813,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 2103822,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 2104325,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 2104334,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 2104837,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 2104846,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 2105349,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 15612806,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 2105358,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 2105861,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 8262412,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 2105870,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 2106382,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 2106894,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 2107406,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 1669226677,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 2107918,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 330054798,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 2108421,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 1346670,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 2108933,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 9287881,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 2109454,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 2109966,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 2110478,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 2110990,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 2111502,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 2112014,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 2112526,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 2113038,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 2113540,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 2113668,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 7340033,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 9437185,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 1233125376,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 1258291712,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 109867832,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 1258292224,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 1258292736,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 1258293248,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 109883658,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 1258293760,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 109898521,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 1258294272,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 109898770,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 1258294784,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 109896458,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 1258295296,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 109898021,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 1258295808,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 109898760,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 1258296320,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 109897923,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 1258296832,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 109866211,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 1258297344,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 109861283,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 1258297856,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 109890774,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 1258298880,
                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 1258299392,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 1258301952,
                     "ifSpeed": 200000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 200000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 1258302976,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 10634551,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 1258308096,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 127644530,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 1258310144,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 1636853,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 1258314240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 1258314752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 1258316288,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 3189443,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34937,9 +34937,11 @@
                     "portName": null,
                     "ifIndex": 1258318336,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35029,9 +35031,7 @@
                     "ifOutMulticastPkts": 23875218,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35044,9 +35044,11 @@
                     "portName": null,
                     "ifIndex": 1275068928,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35136,9 +35138,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35151,9 +35151,11 @@
                     "portName": null,
                     "ifIndex": 1275119104,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35243,9 +35245,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35258,9 +35258,11 @@
                     "portName": null,
                     "ifIndex": 1275119616,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35350,9 +35352,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35365,9 +35365,11 @@
                     "portName": null,
                     "ifIndex": 1276195328,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35457,9 +35459,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35472,9 +35472,11 @@
                     "portName": null,
                     "ifIndex": 1276200448,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35564,9 +35566,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35579,9 +35579,11 @@
                     "portName": null,
                     "ifIndex": 1276205568,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35671,9 +35673,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35686,9 +35686,11 @@
                     "portName": null,
                     "ifIndex": 1276206080,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35778,9 +35780,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35793,9 +35793,11 @@
                     "portName": null,
                     "ifIndex": 1276244480,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35885,9 +35887,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35900,9 +35900,11 @@
                     "portName": null,
                     "ifIndex": 1276244992,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -35992,9 +35994,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36007,9 +36007,11 @@
                     "portName": null,
                     "ifIndex": 1276245504,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36099,9 +36101,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36114,9 +36114,11 @@
                     "portName": null,
                     "ifIndex": 1276297216,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36206,9 +36208,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36221,9 +36221,11 @@
                     "portName": null,
                     "ifIndex": 1276298752,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36313,9 +36315,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36328,9 +36328,11 @@
                     "portName": null,
                     "ifIndex": 1276299776,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36420,9 +36422,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36435,9 +36435,11 @@
                     "portName": null,
                     "ifIndex": 1276330496,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36527,9 +36529,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36542,9 +36542,11 @@
                     "portName": null,
                     "ifIndex": 1276356096,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36634,9 +36636,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36649,9 +36649,11 @@
                     "portName": null,
                     "ifIndex": 1276368896,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36741,9 +36743,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36756,9 +36756,11 @@
                     "portName": null,
                     "ifIndex": 1276379648,
                     "ifSpeed": 80000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 80000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36848,9 +36850,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/drac.json b/tests/data/drac.json
index 171e2e8ee9..b46bcfba4a 100644
--- a/tests/data/drac.json
+++ b/tests/data/drac.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/draytek.json b/tests/data/draytek.json
index 1c7c4cd5eb..34cad868b2 100644
--- a/tests/data/draytek.json
+++ b/tests/data/draytek.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/eaton-matrix.json b/tests/data/eaton-matrix.json
index 25cb084880..4824c3d57b 100644
--- a/tests/data/eaton-matrix.json
+++ b/tests/data/eaton-matrix.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/eaton-mgeups_5px.json b/tests/data/eaton-mgeups_5px.json
index 68818cb39b..b8a296f49b 100644
--- a/tests/data/eaton-mgeups_5px.json
+++ b/tests/data/eaton-mgeups_5px.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/eatonups.json b/tests/data/eatonups.json
index b710fcf31f..e03e72915f 100644
--- a/tests/data/eatonups.json
+++ b/tests/data/eatonups.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgecos_2100-28p.json b/tests/data/edgecos_2100-28p.json
index bb51a8188f..0d03f72222 100644
--- a/tests/data/edgecos_2100-28p.json
+++ b/tests/data/edgecos_2100-28p.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 1002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 1004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 1005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 1006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 1007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 1008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 1009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 1010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 24752731,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 25147514,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 33737503,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 38009505,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 11883479,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 13645910,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 42297317,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 75511185,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 159,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 1228624,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 1002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 1004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 1005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 1006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 1007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 1008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 1009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 1010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgecos_ecs2100-10t.json b/tests/data/edgecos_ecs2100-10t.json
index 41d7216790..4b040f5d64 100644
--- a/tests/data/edgecos_ecs2100-10t.json
+++ b/tests/data/edgecos_ecs2100-10t.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 276,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgecos_ecs4100-28t.json b/tests/data/edgecos_ecs4100-28t.json
index 2fa8ff2779..9d97756e81 100644
--- a/tests/data/edgecos_ecs4100-28t.json
+++ b/tests/data/edgecos_ecs4100-28t.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 1051,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 1201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 1231,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 1268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 1301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 1501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 3005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 4001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 5024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 2380889,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 2381450,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 1290337,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 385578327,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 505574,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 2380900,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 2290225,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 778318347,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 769628121,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 422374699,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 1052,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 1320806,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 12498796,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 1574920,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 1051,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 1201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 1231,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 1268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 1301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 1501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 3005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 4001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 5024,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgecos_ecs4110-28t.json b/tests/data/edgecos_ecs4110-28t.json
index 8819a01ce9..cfe3705448 100644
--- a/tests/data/edgecos_ecs4110-28t.json
+++ b/tests/data/edgecos_ecs4110-28t.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 331444,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 8437666,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 67705055,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 931,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 67708196,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 644154,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgecos_es3510ma.json b/tests/data/edgecos_es3510ma.json
index 8ade61f6ea..4edc4416b0 100644
--- a/tests/data/edgecos_es3510ma.json
+++ b/tests/data/edgecos_es3510ma.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 746,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 1200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 2170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 1127132,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 1132385,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 1127671,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 190338,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 747461,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 1219125,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 746,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 1200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 2170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgeos-ep.json b/tests/data/edgeos-ep.json
index af5712d08c..dccd4f7836 100644
--- a/tests/data/edgeos-ep.json
+++ b/tests/data/edgeos-ep.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgeos.json b/tests/data/edgeos.json
index cd6c242409..be290fbbf8 100644
--- a/tests/data/edgeos.json
+++ b/tests/data/edgeos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgeswitch_10xp.json b/tests/data/edgeswitch_10xp.json
index c53a594c9e..f95b4a498d 100644
--- a/tests/data/edgeswitch_10xp.json
+++ b/tests/data/edgeswitch_10xp.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 920705,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 3873904,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 355183,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 3221315,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 5354283,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 3785268,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 1000,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 9139551,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/edgeswitch_es-24-250w.json b/tests/data/edgeswitch_es-24-250w.json
index 4a6b448dde..8fa098bb5c 100644
--- a/tests/data/edgeswitch_es-24-250w.json
+++ b/tests/data/edgeswitch_es-24-250w.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 14923575,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 10653614,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 8535320,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 8304704,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 12696691,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 5879509,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 3193376,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 4082028,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 101413,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 11835391,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 2264391,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 1655501,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slot",
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cpu interface for slot",
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 7694095,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/eltek-webpower.json b/tests/data/eltek-webpower.json
index 949dfe7c47..c48a3851b4 100644
--- a/tests/data/eltek-webpower.json
+++ b/tests/data/eltek-webpower.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/epson.json b/tests/data/epson.json
index e61a07259e..e14cd1e53f 100644
--- a/tests/data/epson.json
+++ b/tests/data/epson.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ericsson-ml.json b/tests/data/ericsson-ml.json
index b257f79f42..0020dbf230 100644
--- a/tests/data/ericsson-ml.json
+++ b/tests/data/ericsson-ml.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 10100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "0",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 20101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 20102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 20103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 20104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 30105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 110101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 120101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 10100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "0",
                     "ifOperStatus_prev": "0",
                     "ifAdminStatus": "0",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "lanxport",
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 20101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 20102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 3,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "lanxport",
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 20103,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "lanxport",
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 20104,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wanxport",
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 30105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "carriertermination",
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 110101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 120101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "0",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/exa_e7-2.json b/tests/data/exa_e7-2.json
index 5c84e08205..e2e8eaa6d5 100644
--- a/tests/data/exa_e7-2.json
+++ b/tests/data/exa_e7-2.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 10101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 10102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 10103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 10104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 10201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 10202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 10203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 10204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 30201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 30203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 30204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 100001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 100002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 100003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 100004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 100033,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 100034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 100035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 100036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 41924258,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 16349673616,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 40291830,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 6334376,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 6334303,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 6156173,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 16681765,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 24351826,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 35679069,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -5298,9 +5298,11 @@
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -5390,9 +5392,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -5405,9 +5405,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -5497,9 +5499,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5512,9 +5512,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -5604,9 +5606,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5619,9 +5619,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "down",
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@@ -5711,9 +5713,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5726,9 +5726,11 @@
                     "portName": null,
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@@ -5818,9 +5820,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5833,9 +5833,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "down",
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@@ -5925,9 +5927,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5940,9 +5940,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -6032,9 +6034,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6047,9 +6047,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -6139,9 +6141,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6154,9 +6154,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -6246,9 +6248,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6261,9 +6261,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -6353,9 +6355,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6368,9 +6368,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -6460,9 +6462,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6475,9 +6475,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -6567,9 +6569,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6582,9 +6582,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -6674,9 +6676,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6689,9 +6689,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "down",
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@@ -6781,9 +6783,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6796,9 +6796,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "down",
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@@ -6888,9 +6890,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6903,9 +6903,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -6995,9 +6997,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7010,9 +7010,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -7102,9 +7104,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7117,9 +7117,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7224,9 +7224,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7331,9 +7331,11 @@
                     "portName": null,
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                     "ifSpeed": 2500000000,
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                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7438,9 +7438,11 @@
                     "portName": null,
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                     "ifSpeed": 2500000000,
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                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 30203,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7652,9 +7652,11 @@
                     "portName": null,
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                     "ifSpeed": 2500000000,
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                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7759,9 +7759,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
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@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7973,9 +7973,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8080,9 +8080,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8187,9 +8187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 100034,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": null,
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@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 100035,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 100036,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/exagridos.json b/tests/data/exagridos.json
index f3cc5919ec..118b5690e4 100644
--- a/tests/data/exagridos.json
+++ b/tests/data/exagridos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fabos.json b/tests/data/fabos.json
index 9d8587a591..2b6e7dd543 100644
--- a/tests/data/fabos.json
+++ b/tests/data/fabos.json
@@ -69,9 +69,11 @@
                     "portName": null,
                     "ifIndex": 805306369,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -161,9 +163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -176,9 +176,11 @@
                     "portName": null,
                     "ifIndex": 805306370,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -268,9 +270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -283,9 +283,11 @@
                     "portName": null,
                     "ifIndex": 805306371,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -375,9 +377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -390,9 +390,11 @@
                     "portName": null,
                     "ifIndex": 805306372,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -482,9 +484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -497,9 +497,11 @@
                     "portName": null,
                     "ifIndex": 805306373,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -589,9 +591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -604,9 +604,11 @@
                     "portName": null,
                     "ifIndex": 805306374,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -696,9 +698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -711,9 +711,11 @@
                     "portName": null,
                     "ifIndex": 1073741824,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -803,9 +805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -818,9 +818,11 @@
                     "portName": null,
                     "ifIndex": 1073741825,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -910,9 +912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -925,9 +925,11 @@
                     "portName": null,
                     "ifIndex": 1073741826,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1017,9 +1019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1032,9 +1032,11 @@
                     "portName": null,
                     "ifIndex": 1073741827,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1124,9 +1126,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1139,9 +1139,11 @@
                     "portName": null,
                     "ifIndex": 1073741828,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1231,9 +1233,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1246,9 +1246,11 @@
                     "portName": null,
                     "ifIndex": 1073741829,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1338,9 +1340,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1353,9 +1353,11 @@
                     "portName": null,
                     "ifIndex": 1073741830,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1445,9 +1447,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1460,9 +1460,11 @@
                     "portName": null,
                     "ifIndex": 1073741831,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1552,9 +1554,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1567,9 +1567,11 @@
                     "portName": null,
                     "ifIndex": 1073741832,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1659,9 +1661,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1674,9 +1674,11 @@
                     "portName": null,
                     "ifIndex": 1073741833,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1766,9 +1768,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1781,9 +1781,11 @@
                     "portName": null,
                     "ifIndex": 1073741834,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1873,9 +1875,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1888,9 +1888,11 @@
                     "portName": null,
                     "ifIndex": 1073741835,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1980,9 +1982,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1995,9 +1995,11 @@
                     "portName": null,
                     "ifIndex": 1073741836,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2087,9 +2089,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2102,9 +2102,11 @@
                     "portName": null,
                     "ifIndex": 1073741837,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2194,9 +2196,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2209,9 +2209,11 @@
                     "portName": null,
                     "ifIndex": 1073741838,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2301,9 +2303,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2316,9 +2316,11 @@
                     "portName": null,
                     "ifIndex": 1073741839,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2408,9 +2410,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2423,9 +2423,11 @@
                     "portName": null,
                     "ifIndex": 1073741840,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2515,9 +2517,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2530,9 +2530,11 @@
                     "portName": null,
                     "ifIndex": 1073741841,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2622,9 +2624,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2637,9 +2637,11 @@
                     "portName": null,
                     "ifIndex": 1073741842,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2729,9 +2731,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2744,9 +2744,11 @@
                     "portName": null,
                     "ifIndex": 1073741843,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2836,9 +2838,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2851,9 +2851,11 @@
                     "portName": null,
                     "ifIndex": 1073741844,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2943,9 +2945,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2958,9 +2958,11 @@
                     "portName": null,
                     "ifIndex": 1073741845,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3050,9 +3052,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3065,9 +3065,11 @@
                     "portName": null,
                     "ifIndex": 1073741846,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3157,9 +3159,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3172,9 +3172,11 @@
                     "portName": null,
                     "ifIndex": 1073741847,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3264,9 +3266,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3279,9 +3279,11 @@
                     "portName": null,
                     "ifIndex": 1073741848,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3371,9 +3373,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3386,9 +3386,11 @@
                     "portName": null,
                     "ifIndex": 1073741849,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3478,9 +3480,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3493,9 +3493,11 @@
                     "portName": null,
                     "ifIndex": 1073741850,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3585,9 +3587,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3600,9 +3600,11 @@
                     "portName": null,
                     "ifIndex": 1073741851,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3692,9 +3694,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3707,9 +3707,11 @@
                     "portName": null,
                     "ifIndex": 1073741852,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3799,9 +3801,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3814,9 +3814,11 @@
                     "portName": null,
                     "ifIndex": 1073741853,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3906,9 +3908,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3921,9 +3921,11 @@
                     "portName": null,
                     "ifIndex": 1073741854,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4013,9 +4015,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4028,9 +4028,11 @@
                     "portName": null,
                     "ifIndex": 1073741855,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4120,9 +4122,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4135,9 +4135,11 @@
                     "portName": null,
                     "ifIndex": 1073741856,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4227,9 +4229,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4242,9 +4242,11 @@
                     "portName": null,
                     "ifIndex": 1073741857,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4334,9 +4336,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4349,9 +4349,11 @@
                     "portName": null,
                     "ifIndex": 1073741858,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4441,9 +4443,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4456,9 +4456,11 @@
                     "portName": null,
                     "ifIndex": 1073741859,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4548,9 +4550,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4563,9 +4563,11 @@
                     "portName": null,
                     "ifIndex": 1073741860,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4655,9 +4657,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4670,9 +4670,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4762,9 +4764,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4777,9 +4777,11 @@
                     "portName": null,
                     "ifIndex": 1073741862,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4869,9 +4871,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4884,9 +4884,11 @@
                     "portName": null,
                     "ifIndex": 1073741863,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4976,9 +4978,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4991,9 +4991,11 @@
                     "portName": null,
                     "ifIndex": 1073741864,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5083,9 +5085,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5098,9 +5098,11 @@
                     "portName": null,
                     "ifIndex": 1073741865,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5190,9 +5192,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5205,9 +5205,11 @@
                     "portName": null,
                     "ifIndex": 1073741866,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5297,9 +5299,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5312,9 +5312,11 @@
                     "portName": null,
                     "ifIndex": 1073741867,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5404,9 +5406,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5419,9 +5419,11 @@
                     "portName": null,
                     "ifIndex": 1073741868,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5511,9 +5513,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5526,9 +5526,11 @@
                     "portName": null,
                     "ifIndex": 1073741869,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5618,9 +5620,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5633,9 +5633,11 @@
                     "portName": null,
                     "ifIndex": 1073741870,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5725,9 +5727,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5740,9 +5740,11 @@
                     "portName": null,
                     "ifIndex": 1073741871,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5832,9 +5834,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5847,9 +5847,11 @@
                     "portName": null,
                     "ifIndex": 1073741872,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5939,9 +5941,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5954,9 +5954,11 @@
                     "portName": null,
                     "ifIndex": 1073741873,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6046,9 +6048,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6061,9 +6061,11 @@
                     "portName": null,
                     "ifIndex": 1073741874,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6153,9 +6155,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6168,9 +6168,11 @@
                     "portName": null,
                     "ifIndex": 1073741875,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6260,9 +6262,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6275,9 +6275,11 @@
                     "portName": null,
                     "ifIndex": 1073741876,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6367,9 +6369,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6382,9 +6382,11 @@
                     "portName": null,
                     "ifIndex": 1073741877,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6474,9 +6476,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6489,9 +6489,11 @@
                     "portName": null,
                     "ifIndex": 1073741878,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6581,9 +6583,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6596,9 +6596,11 @@
                     "portName": null,
                     "ifIndex": 1073741879,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6688,9 +6690,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6703,9 +6703,11 @@
                     "portName": null,
                     "ifIndex": 1073741880,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6795,9 +6797,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6810,9 +6810,11 @@
                     "portName": null,
                     "ifIndex": 1073741881,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6902,9 +6904,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6917,9 +6917,11 @@
                     "portName": null,
                     "ifIndex": 1073741882,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7009,9 +7011,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7024,9 +7024,11 @@
                     "portName": null,
                     "ifIndex": 1073741883,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7116,9 +7118,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7131,9 +7131,11 @@
                     "portName": null,
                     "ifIndex": 1073741884,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7223,9 +7225,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7238,9 +7238,11 @@
                     "portName": null,
                     "ifIndex": 1073741885,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7330,9 +7332,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7345,9 +7345,11 @@
                     "portName": null,
                     "ifIndex": 1073741886,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7437,9 +7439,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7452,9 +7452,11 @@
                     "portName": null,
                     "ifIndex": 1073741887,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7544,9 +7546,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7559,9 +7559,11 @@
                     "portName": null,
                     "ifIndex": 1073741888,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7651,9 +7653,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7666,9 +7666,11 @@
                     "portName": null,
                     "ifIndex": 1073741889,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7758,9 +7760,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7773,9 +7773,11 @@
                     "portName": null,
                     "ifIndex": 1073741890,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7865,9 +7867,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7880,9 +7880,11 @@
                     "portName": null,
                     "ifIndex": 1073741891,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7972,9 +7974,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7987,9 +7987,11 @@
                     "portName": null,
                     "ifIndex": 1073741892,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8079,9 +8081,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8094,9 +8094,11 @@
                     "portName": null,
                     "ifIndex": 1073741893,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8186,9 +8188,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8201,9 +8201,11 @@
                     "portName": null,
                     "ifIndex": 1073741894,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8293,9 +8295,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8308,9 +8308,11 @@
                     "portName": null,
                     "ifIndex": 1073741895,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8400,9 +8402,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8415,9 +8415,11 @@
                     "portName": null,
                     "ifIndex": 1073741896,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8507,9 +8509,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8522,9 +8522,11 @@
                     "portName": null,
                     "ifIndex": 1073741897,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8614,9 +8616,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8629,9 +8629,11 @@
                     "portName": null,
                     "ifIndex": 1073741898,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8721,9 +8723,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8736,9 +8736,11 @@
                     "portName": null,
                     "ifIndex": 1073741899,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8828,9 +8830,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8843,9 +8843,11 @@
                     "portName": null,
                     "ifIndex": 1073741900,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8935,9 +8937,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8950,9 +8950,11 @@
                     "portName": null,
                     "ifIndex": 1073741901,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9042,9 +9044,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9057,9 +9057,11 @@
                     "portName": null,
                     "ifIndex": 1073741902,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9149,9 +9151,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9164,9 +9164,11 @@
                     "portName": null,
                     "ifIndex": 1073741903,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9256,9 +9258,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9271,9 +9271,11 @@
                     "portName": null,
                     "ifIndex": 1073741904,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9363,9 +9365,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9378,9 +9378,11 @@
                     "portName": null,
                     "ifIndex": 1073741905,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9470,9 +9472,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9485,9 +9485,11 @@
                     "portName": null,
                     "ifIndex": 1073741906,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9577,9 +9579,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9592,9 +9592,11 @@
                     "portName": null,
                     "ifIndex": 1073741907,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9684,9 +9686,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9699,9 +9699,11 @@
                     "portName": null,
                     "ifIndex": 1073741908,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9791,9 +9793,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9806,9 +9806,11 @@
                     "portName": null,
                     "ifIndex": 1073741909,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9898,9 +9900,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9913,9 +9913,11 @@
                     "portName": null,
                     "ifIndex": 1073741910,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10005,9 +10007,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10020,9 +10020,11 @@
                     "portName": null,
                     "ifIndex": 1073741911,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10112,9 +10114,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10127,9 +10127,11 @@
                     "portName": null,
                     "ifIndex": 1073741912,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10219,9 +10221,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10234,9 +10234,11 @@
                     "portName": null,
                     "ifIndex": 1073741913,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10326,9 +10328,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10341,9 +10341,11 @@
                     "portName": null,
                     "ifIndex": 1073741914,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10433,9 +10435,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10448,9 +10448,11 @@
                     "portName": null,
                     "ifIndex": 1073741915,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10540,9 +10542,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10555,9 +10555,11 @@
                     "portName": null,
                     "ifIndex": 1073741916,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10647,9 +10649,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10662,9 +10662,11 @@
                     "portName": null,
                     "ifIndex": 1073741917,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10754,9 +10756,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10769,9 +10769,11 @@
                     "portName": null,
                     "ifIndex": 1073741918,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10861,9 +10863,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10876,9 +10876,11 @@
                     "portName": null,
                     "ifIndex": 1073741919,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10968,9 +10970,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -10987,9 +10987,11 @@
                     "portName": null,
                     "ifIndex": 805306369,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11079,9 +11081,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11094,9 +11094,11 @@
                     "portName": null,
                     "ifIndex": 805306370,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11186,9 +11188,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11201,9 +11201,11 @@
                     "portName": null,
                     "ifIndex": 805306371,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11293,9 +11295,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11308,9 +11308,11 @@
                     "portName": null,
                     "ifIndex": 805306372,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11400,9 +11402,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11415,9 +11415,11 @@
                     "portName": null,
                     "ifIndex": 805306373,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11507,9 +11509,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11522,9 +11522,11 @@
                     "portName": null,
                     "ifIndex": 805306374,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11614,9 +11616,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11629,9 +11629,11 @@
                     "portName": null,
                     "ifIndex": 1073741824,
                     "ifSpeed": 4000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 4000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11721,9 +11723,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11736,9 +11736,11 @@
                     "portName": null,
                     "ifIndex": 1073741825,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11828,9 +11830,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11843,9 +11843,11 @@
                     "portName": null,
                     "ifIndex": 1073741826,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11935,9 +11937,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11950,9 +11950,11 @@
                     "portName": null,
                     "ifIndex": 1073741827,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12042,9 +12044,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12057,9 +12057,11 @@
                     "portName": null,
                     "ifIndex": 1073741828,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12149,9 +12151,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12164,9 +12164,11 @@
                     "portName": null,
                     "ifIndex": 1073741829,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12256,9 +12258,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12271,9 +12271,11 @@
                     "portName": null,
                     "ifIndex": 1073741830,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12363,9 +12365,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12378,9 +12378,11 @@
                     "portName": null,
                     "ifIndex": 1073741831,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12470,9 +12472,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12485,9 +12485,11 @@
                     "portName": null,
                     "ifIndex": 1073741832,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12577,9 +12579,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12592,9 +12592,11 @@
                     "portName": null,
                     "ifIndex": 1073741833,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12684,9 +12686,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12699,9 +12699,11 @@
                     "portName": null,
                     "ifIndex": 1073741834,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12791,9 +12793,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12806,9 +12806,11 @@
                     "portName": null,
                     "ifIndex": 1073741835,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12898,9 +12900,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12913,9 +12913,11 @@
                     "portName": null,
                     "ifIndex": 1073741836,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13005,9 +13007,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13020,9 +13020,11 @@
                     "portName": null,
                     "ifIndex": 1073741837,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13112,9 +13114,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13127,9 +13127,11 @@
                     "portName": null,
                     "ifIndex": 1073741838,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13219,9 +13221,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13234,9 +13234,11 @@
                     "portName": null,
                     "ifIndex": 1073741839,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13326,9 +13328,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13341,9 +13341,11 @@
                     "portName": null,
                     "ifIndex": 1073741840,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13433,9 +13435,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13448,9 +13448,11 @@
                     "portName": null,
                     "ifIndex": 1073741841,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13540,9 +13542,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13555,9 +13555,11 @@
                     "portName": null,
                     "ifIndex": 1073741842,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13647,9 +13649,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13662,9 +13662,11 @@
                     "portName": null,
                     "ifIndex": 1073741843,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13754,9 +13756,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13769,9 +13769,11 @@
                     "portName": null,
                     "ifIndex": 1073741844,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13861,9 +13863,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13876,9 +13876,11 @@
                     "portName": null,
                     "ifIndex": 1073741845,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13968,9 +13970,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13983,9 +13983,11 @@
                     "portName": null,
                     "ifIndex": 1073741846,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14075,9 +14077,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14090,9 +14090,11 @@
                     "portName": null,
                     "ifIndex": 1073741847,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14182,9 +14184,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14197,9 +14197,11 @@
                     "portName": null,
                     "ifIndex": 1073741848,
                     "ifSpeed": 4000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 4000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14289,9 +14291,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14304,9 +14304,11 @@
                     "portName": null,
                     "ifIndex": 1073741849,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14396,9 +14398,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14411,9 +14411,11 @@
                     "portName": null,
                     "ifIndex": 1073741850,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14503,9 +14505,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14518,9 +14518,11 @@
                     "portName": null,
                     "ifIndex": 1073741851,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14610,9 +14612,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14625,9 +14625,11 @@
                     "portName": null,
                     "ifIndex": 1073741852,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14717,9 +14719,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14732,9 +14732,11 @@
                     "portName": null,
                     "ifIndex": 1073741853,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14824,9 +14826,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14839,9 +14839,11 @@
                     "portName": null,
                     "ifIndex": 1073741854,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14931,9 +14933,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14946,9 +14946,11 @@
                     "portName": null,
                     "ifIndex": 1073741855,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15038,9 +15040,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15053,9 +15053,11 @@
                     "portName": null,
                     "ifIndex": 1073741856,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15145,9 +15147,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15160,9 +15160,11 @@
                     "portName": null,
                     "ifIndex": 1073741857,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15252,9 +15254,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15267,9 +15267,11 @@
                     "portName": null,
                     "ifIndex": 1073741858,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15359,9 +15361,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15374,9 +15374,11 @@
                     "portName": null,
                     "ifIndex": 1073741859,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15466,9 +15468,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15481,9 +15481,11 @@
                     "portName": null,
                     "ifIndex": 1073741860,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15573,9 +15575,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15588,9 +15588,11 @@
                     "portName": null,
                     "ifIndex": 1073741861,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15680,9 +15682,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15695,9 +15695,11 @@
                     "portName": null,
                     "ifIndex": 1073741862,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15787,9 +15789,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15802,9 +15802,11 @@
                     "portName": null,
                     "ifIndex": 1073741863,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15894,9 +15896,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15909,9 +15909,11 @@
                     "portName": null,
                     "ifIndex": 1073741864,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16001,9 +16003,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16016,9 +16016,11 @@
                     "portName": null,
                     "ifIndex": 1073741865,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16108,9 +16110,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16123,9 +16123,11 @@
                     "portName": null,
                     "ifIndex": 1073741866,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16215,9 +16217,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16230,9 +16230,11 @@
                     "portName": null,
                     "ifIndex": 1073741867,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16322,9 +16324,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16337,9 +16337,11 @@
                     "portName": null,
                     "ifIndex": 1073741868,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16429,9 +16431,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16444,9 +16444,11 @@
                     "portName": null,
                     "ifIndex": 1073741869,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16536,9 +16538,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16551,9 +16551,11 @@
                     "portName": null,
                     "ifIndex": 1073741870,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16643,9 +16645,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16658,9 +16658,11 @@
                     "portName": null,
                     "ifIndex": 1073741871,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16750,9 +16752,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16765,9 +16765,11 @@
                     "portName": null,
                     "ifIndex": 1073741872,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16857,9 +16859,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16872,9 +16872,11 @@
                     "portName": null,
                     "ifIndex": 1073741873,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16964,9 +16966,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16979,9 +16979,11 @@
                     "portName": null,
                     "ifIndex": 1073741874,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17071,9 +17073,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17086,9 +17086,11 @@
                     "portName": null,
                     "ifIndex": 1073741875,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17178,9 +17180,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17193,9 +17193,11 @@
                     "portName": null,
                     "ifIndex": 1073741876,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17285,9 +17287,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17300,9 +17300,11 @@
                     "portName": null,
                     "ifIndex": 1073741877,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17392,9 +17394,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17407,9 +17407,11 @@
                     "portName": null,
                     "ifIndex": 1073741878,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17499,9 +17501,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17514,9 +17514,11 @@
                     "portName": null,
                     "ifIndex": 1073741879,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17606,9 +17608,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17621,9 +17621,11 @@
                     "portName": null,
                     "ifIndex": 1073741880,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17713,9 +17715,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17728,9 +17728,11 @@
                     "portName": null,
                     "ifIndex": 1073741881,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17820,9 +17822,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17835,9 +17835,11 @@
                     "portName": null,
                     "ifIndex": 1073741882,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17927,9 +17929,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17942,9 +17942,11 @@
                     "portName": null,
                     "ifIndex": 1073741883,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18034,9 +18036,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18049,9 +18049,11 @@
                     "portName": null,
                     "ifIndex": 1073741884,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18141,9 +18143,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18156,9 +18156,11 @@
                     "portName": null,
                     "ifIndex": 1073741885,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18248,9 +18250,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18263,9 +18263,11 @@
                     "portName": null,
                     "ifIndex": 1073741886,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18355,9 +18357,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18370,9 +18370,11 @@
                     "portName": null,
                     "ifIndex": 1073741887,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18462,9 +18464,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18477,9 +18477,11 @@
                     "portName": null,
                     "ifIndex": 1073741888,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18569,9 +18571,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18584,9 +18584,11 @@
                     "portName": null,
                     "ifIndex": 1073741889,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18676,9 +18678,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18691,9 +18691,11 @@
                     "portName": null,
                     "ifIndex": 1073741890,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18783,9 +18785,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18798,9 +18798,11 @@
                     "portName": null,
                     "ifIndex": 1073741891,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18890,9 +18892,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18905,9 +18905,11 @@
                     "portName": null,
                     "ifIndex": 1073741892,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18997,9 +18999,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19012,9 +19012,11 @@
                     "portName": null,
                     "ifIndex": 1073741893,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19104,9 +19106,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19119,9 +19119,11 @@
                     "portName": null,
                     "ifIndex": 1073741894,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19211,9 +19213,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19226,9 +19226,11 @@
                     "portName": null,
                     "ifIndex": 1073741895,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19318,9 +19320,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19333,9 +19333,11 @@
                     "portName": null,
                     "ifIndex": 1073741896,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19425,9 +19427,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19440,9 +19440,11 @@
                     "portName": null,
                     "ifIndex": 1073741897,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19532,9 +19534,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19547,9 +19547,11 @@
                     "portName": null,
                     "ifIndex": 1073741898,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19639,9 +19641,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19654,9 +19654,11 @@
                     "portName": null,
                     "ifIndex": 1073741899,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19746,9 +19748,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19761,9 +19761,11 @@
                     "portName": null,
                     "ifIndex": 1073741900,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19853,9 +19855,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19868,9 +19868,11 @@
                     "portName": null,
                     "ifIndex": 1073741901,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19960,9 +19962,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19975,9 +19975,11 @@
                     "portName": null,
                     "ifIndex": 1073741902,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20067,9 +20069,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20082,9 +20082,11 @@
                     "portName": null,
                     "ifIndex": 1073741903,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20174,9 +20176,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20189,9 +20189,11 @@
                     "portName": null,
                     "ifIndex": 1073741904,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20281,9 +20283,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20296,9 +20296,11 @@
                     "portName": null,
                     "ifIndex": 1073741905,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20388,9 +20390,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20403,9 +20403,11 @@
                     "portName": null,
                     "ifIndex": 1073741906,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20495,9 +20497,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20510,9 +20510,11 @@
                     "portName": null,
                     "ifIndex": 1073741907,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20602,9 +20604,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20617,9 +20617,11 @@
                     "portName": null,
                     "ifIndex": 1073741908,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20709,9 +20711,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20724,9 +20724,11 @@
                     "portName": null,
                     "ifIndex": 1073741909,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20816,9 +20818,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20831,9 +20831,11 @@
                     "portName": null,
                     "ifIndex": 1073741910,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20923,9 +20925,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20938,9 +20938,11 @@
                     "portName": null,
                     "ifIndex": 1073741911,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21030,9 +21032,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21045,9 +21045,11 @@
                     "portName": null,
                     "ifIndex": 1073741912,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21137,9 +21139,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21152,9 +21152,11 @@
                     "portName": null,
                     "ifIndex": 1073741913,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21244,9 +21246,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21259,9 +21259,11 @@
                     "portName": null,
                     "ifIndex": 1073741914,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21351,9 +21353,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21366,9 +21366,11 @@
                     "portName": null,
                     "ifIndex": 1073741915,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21458,9 +21460,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21473,9 +21473,11 @@
                     "portName": null,
                     "ifIndex": 1073741916,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21565,9 +21567,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21580,9 +21580,11 @@
                     "portName": null,
                     "ifIndex": 1073741917,
                     "ifSpeed": 16000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 16000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21672,9 +21674,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21687,9 +21687,11 @@
                     "portName": null,
                     "ifIndex": 1073741918,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21779,9 +21781,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21794,9 +21794,11 @@
                     "portName": null,
                     "ifIndex": 1073741919,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21886,9 +21888,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fibernet-xmux4-plus.json b/tests/data/fibernet-xmux4-plus.json
index f8ff493c50..e67b85942b 100644
--- a/tests/data/fibernet-xmux4-plus.json
+++ b/tests/data/fibernet-xmux4-plus.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/firebrick.json b/tests/data/firebrick.json
index 06c6268537..4909183f13 100644
--- a/tests/data/firebrick.json
+++ b/tests/data/firebrick.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 4104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 12296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 16392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 22292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 4104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 12296,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 16392,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortigate.json b/tests/data/fortigate.json
index d67abd9ad7..b225be9f73 100644
--- a/tests/data/fortigate.json
+++ b/tests/data/fortigate.json
@@ -69,9 +69,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -161,9 +163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -176,9 +176,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -268,9 +270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -283,9 +283,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -375,9 +377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -390,9 +390,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -482,9 +484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -497,9 +497,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -589,9 +591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -604,9 +604,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -696,9 +698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -711,9 +711,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -803,9 +805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -818,9 +818,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -910,9 +912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -925,9 +925,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1017,9 +1019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1032,9 +1032,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1124,9 +1126,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1139,9 +1139,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1231,9 +1233,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1246,9 +1246,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1338,9 +1340,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1353,9 +1353,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1445,9 +1447,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1460,9 +1460,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1552,9 +1554,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1567,9 +1567,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1659,9 +1661,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1674,9 +1674,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1766,9 +1768,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1781,9 +1781,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1873,9 +1875,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1888,9 +1888,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1980,9 +1982,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1995,9 +1995,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2087,9 +2089,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2102,9 +2102,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2194,9 +2196,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2209,9 +2209,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2301,9 +2303,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2316,9 +2316,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2408,9 +2410,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2423,9 +2423,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2515,9 +2517,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2530,9 +2530,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2622,9 +2624,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2637,9 +2637,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2729,9 +2731,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2744,9 +2744,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2836,9 +2838,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2851,9 +2851,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2943,9 +2945,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2958,9 +2958,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3050,9 +3052,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3065,9 +3065,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3157,9 +3159,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3172,9 +3172,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3264,9 +3266,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3279,9 +3279,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3371,9 +3373,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3386,9 +3386,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3478,9 +3480,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3493,9 +3493,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3585,9 +3587,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3600,9 +3600,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3692,9 +3694,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3707,9 +3707,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3799,9 +3801,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3818,9 +3818,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3910,9 +3912,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3925,9 +3925,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4017,9 +4019,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4032,9 +4032,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4124,9 +4126,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4139,9 +4139,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4231,9 +4233,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4246,9 +4246,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4338,9 +4340,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4353,9 +4353,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4445,9 +4447,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4460,9 +4460,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4552,9 +4554,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4567,9 +4567,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4659,9 +4661,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4674,9 +4674,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4766,9 +4768,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4781,9 +4781,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4873,9 +4875,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4888,9 +4888,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4980,9 +4982,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4995,9 +4995,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5087,9 +5089,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5102,9 +5102,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5194,9 +5196,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5209,9 +5209,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5301,9 +5303,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5316,9 +5316,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5408,9 +5410,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5423,9 +5423,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5515,9 +5517,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5530,9 +5530,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5622,9 +5624,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5637,9 +5637,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5729,9 +5731,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5744,9 +5744,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5836,9 +5838,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5851,9 +5851,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5943,9 +5945,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5958,9 +5958,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6050,9 +6052,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6065,9 +6065,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6157,9 +6159,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6172,9 +6172,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6264,9 +6266,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6279,9 +6279,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6371,9 +6373,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6386,9 +6386,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6478,9 +6480,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6493,9 +6493,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6585,9 +6587,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6600,9 +6600,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6692,9 +6694,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6707,9 +6707,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6799,9 +6801,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6814,9 +6814,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6906,9 +6908,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6921,9 +6921,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7013,9 +7015,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7028,9 +7028,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7120,9 +7122,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7135,9 +7135,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7227,9 +7229,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7242,9 +7242,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7334,9 +7336,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7349,9 +7349,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7441,9 +7443,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7456,9 +7456,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7548,9 +7550,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortigate_100e.json b/tests/data/fortigate_100e.json
index 2a217dc54d..86f34cf893 100644
--- a/tests/data/fortigate_100e.json
+++ b/tests/data/fortigate_100e.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortigate_1500d.json b/tests/data/fortigate_1500d.json
index 2ccf3a769a..3b6a20de61 100644
--- a/tests/data/fortigate_1500d.json
+++ b/tests/data/fortigate_1500d.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6349,9 +6351,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7327,9 +7327,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7419,9 +7421,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -9559,9 +9561,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9773,9 +9775,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15459,9 +15459,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15551,9 +15553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15566,9 +15566,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15658,9 +15660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15765,9 +15767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15780,9 +15780,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15872,9 +15874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15887,9 +15887,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15979,9 +15981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15994,9 +15994,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16086,9 +16088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16101,9 +16101,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16193,9 +16195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16208,9 +16208,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16300,9 +16302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16315,9 +16315,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16407,9 +16409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16514,9 +16516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16529,9 +16529,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16621,9 +16623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16636,9 +16636,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16728,9 +16730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16743,9 +16743,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16835,9 +16837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16942,9 +16944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17049,9 +17051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17156,9 +17158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17263,9 +17265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17370,9 +17372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortigate_fwf60d.json b/tests/data/fortigate_fwf60d.json
index 55d0b8d580..400f1b3f85 100644
--- a/tests/data/fortigate_fwf60d.json
+++ b/tests/data/fortigate_fwf60d.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortiweb.json b/tests/data/fortiweb.json
index f561f99d75..5bb0160bab 100644
--- a/tests/data/fortiweb.json
+++ b/tests/data/fortiweb.json
@@ -145,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -254,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -367,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -476,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fortiwlc.json b/tests/data/fortiwlc.json
index 4291d23388..8f426abcea 100644
--- a/tests/data/fortiwlc.json
+++ b/tests/data/fortiwlc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 67108869,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 67108869,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fs-gbn_2800.json b/tests/data/fs-gbn_2800.json
index e002cfc298..55063580a5 100644
--- a/tests/data/fs-gbn_2800.json
+++ b/tests/data/fs-gbn_2800.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 17825793,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 45569134,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 4071663,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 24672218,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 17371001,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 24980782,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 15292262,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 15292030,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 249309,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 11559542,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 8030936,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 17825793,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 157176689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fs-gbn_3800.json b/tests/data/fs-gbn_3800.json
index e83941cb5a..0628c7ad2b 100644
--- a/tests/data/fs-gbn_3800.json
+++ b/tests/data/fs-gbn_3800.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7098,9 +7100,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7205,9 +7207,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7419,9 +7421,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 17825793,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 17825793,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fs-net-pdu.json b/tests/data/fs-net-pdu.json
index c2a3495f31..b42748a9a0 100644
--- a/tests/data/fs-net-pdu.json
+++ b/tests/data/fs-net-pdu.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fs-switch_5800.json b/tests/data/fs-switch_5800.json
index 05b6820f67..86c8898a00 100644
--- a/tests/data/fs-switch_5800.json
+++ b/tests/data/fs-switch_5800.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 2049,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 4097,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 4893,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 4896,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 9395400,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 10356788,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "description core",
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 2049,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 19752170,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 4097,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 4893,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 4896,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fs-switch_s3900.json b/tests/data/fs-switch_s3900.json
index 5e24accd49..70179ef25f 100644
--- a/tests/data/fs-switch_s3900.json
+++ b/tests/data/fs-switch_s3900.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 363,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 746,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 1030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 1032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 4175150,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 39190,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 4149412,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 14063,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 3302168,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 3364815,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 601786,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 146219411,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 3172695,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 2012755,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 16090243,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 1104021,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 42662479,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 380138652,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 1103137,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 171125882,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 363,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 746,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 1030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 1032,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ftd.json b/tests/data/ftd.json
index fa1cc7b351..4fb885ed4b 100644
--- a/tests/data/ftd.json
+++ b/tests/data/ftd.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 689785,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/fusion.json b/tests/data/fusion.json
index b9d12e97fa..9a362a4d31 100644
--- a/tests/data/fusion.json
+++ b/tests/data/fusion.json
@@ -13,7 +13,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.022969999999999997,
+                    "sensor_current": 0.02297,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -37,7 +37,7 @@
                     "group": null,
                     "sensor_divisor": 1000,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.019620000000000002,
+                    "sensor_current": 0.01962,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -590,7 +590,596 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.4.25",
+                    "sensor_index": "portOpticalMonitoringInfoTxBiasCurrent.25",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 25 - Tx",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.02297,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": 0.02297,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.4.26",
+                    "sensor_index": "portOpticalMonitoringInfoTxBiasCurrent.26",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 26 - Tx",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.01962,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": 0.01962,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.4.28",
+                    "sensor_index": "portOpticalMonitoringInfoTxBiasCurrent.28",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "The last port - Tx",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.04956,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.6.25",
+                    "sensor_index": "portOpticalMonitoringInfoRxPower.25",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 25 - Rx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.88,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.6.26",
+                    "sensor_index": "portOpticalMonitoringInfoRxPower.26",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 26 - Rx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -40,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.6.28",
+                    "sensor_index": "portOpticalMonitoringInfoRxPower.28",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "The last port - Rx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -5.18,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.5.25",
+                    "sensor_index": "portOpticalMonitoringInfoTxPower.25",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 25 - Tx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -0.34,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.5.26",
+                    "sensor_index": "portOpticalMonitoringInfoTxPower.26",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 26 - Tx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -1.6,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.5.28",
+                    "sensor_index": "portOpticalMonitoringInfoTxPower.28",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "The last port - Tx",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -0.62,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "fanspeed",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.9.1.6.1.1",
+                    "sensor_index": "switchFanOperSpeed.1.1",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Unit 1 Fan 1",
+                    "group": "Unit 1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 5510,
+                    "sensor_limit": 9918,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 4408,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "fanspeed",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.9.1.6.1.2",
+                    "sensor_index": "switchFanOperSpeed.1.2",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Unit 1 Fan 2",
+                    "group": "Unit 1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 5504,
+                    "sensor_limit": 9907.2,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 4403.2,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.9.1.3.1.1",
+                    "sensor_index": "switchFanStatus.1.1",
+                    "sensor_type": "switchFanStatus",
+                    "sensor_descr": "Unit 1 Fan 1",
+                    "group": "Unit 1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "switchFanStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.9.1.3.1.2",
+                    "sensor_index": "switchFanStatus.1.2",
+                    "sensor_type": "switchFanStatus",
+                    "sensor_descr": "Unit 1 Fan 2",
+                    "group": "Unit 1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "switchFanStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.3.1.8.1",
+                    "sensor_index": "swPowerStatus.1",
+                    "sensor_type": "swPowerStatus",
+                    "sensor_descr": "Power state",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "swPowerStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.3.1.9.1",
+                    "sensor_index": "swRoleInSystem.1",
+                    "sensor_type": "swRoleInSystem",
+                    "sensor_descr": "Switch role",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "swRoleInSystem"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.2.25",
+                    "sensor_index": "portOpticalMonitoringInfoTemperature.25",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 25",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 34.56,
+                    "sensor_limit": 54.56,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 24.56,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.2.26",
+                    "sensor_index": "portOpticalMonitoringInfoTemperature.26",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 26",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 30.8,
+                    "sensor_limit": 50.8,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 20.8,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.2.28",
+                    "sensor_index": "portOpticalMonitoringInfoTemperature.28",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "The last port",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 36.39,
+                    "sensor_limit": 56.39,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 26.39,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.1.11.1.3.1.1",
+                    "sensor_index": "switchThermalTempValue.1.1",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Unit 1 Thermal 1",
+                    "group": "Unit 1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 36,
+                    "sensor_limit": 56,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 26,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.3.25",
+                    "sensor_index": "portOpticalMonitoringInfoVcc.25",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 25",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.24,
+                    "sensor_limit": 3.726,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.754,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.3.26",
+                    "sensor_index": "portOpticalMonitoringInfoVcc.26",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "Port 26",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.24,
+                    "sensor_limit": 3.726,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.754,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.259.6.10.120.1.2.11.1.3.28",
+                    "sensor_index": "portOpticalMonitoringInfoVcc.28",
+                    "sensor_type": "fusion",
+                    "sensor_descr": "The last port",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.34,
+                    "sensor_limit": 3.841,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.839,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "switchFanStatus",
+                    "state_descr": "ok",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "switchFanStatus",
+                    "state_descr": "failure",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "swPowerStatus",
+                    "state_descr": "internalPower",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "swPowerStatus",
+                    "state_descr": "redundantPower",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "swPowerStatus",
+                    "state_descr": "internalAndRedundantPower",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "swRoleInSystem",
+                    "state_descr": "master",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "swRoleInSystem",
+                    "state_descr": "backupMaster",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "swRoleInSystem",
+                    "state_descr": "slave",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                }
+            ]
+        }
     },
     "os": {
         "discovery": {
diff --git a/tests/data/gaia.json b/tests/data/gaia.json
index 77d1bce06f..cfb89933d0 100644
--- a/tests/data/gaia.json
+++ b/tests/data/gaia.json
@@ -603,9 +603,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -695,9 +697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -710,9 +710,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -802,9 +804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -817,9 +817,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -909,9 +911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -924,9 +924,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1016,9 +1018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1031,9 +1031,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1123,9 +1125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1138,9 +1138,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1230,9 +1232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1245,9 +1245,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1337,9 +1339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1352,9 +1352,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1444,9 +1446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1463,9 +1463,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1555,9 +1557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1570,9 +1570,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1662,9 +1664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1677,9 +1677,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1769,9 +1771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1784,9 +1784,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1876,9 +1878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1891,9 +1891,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1983,9 +1985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1998,9 +1998,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2090,9 +2092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2105,9 +2105,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2197,9 +2199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2212,9 +2212,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2304,9 +2306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/generex-ups_cs121.json b/tests/data/generex-ups_cs121.json
index 9c78d1921a..e1e3fe7aee 100644
--- a/tests/data/generex-ups_cs121.json
+++ b/tests/data/generex-ups_cs121.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/generex-ups_cs141.json b/tests/data/generex-ups_cs141.json
index 9f3586cfba..12f05568a5 100644
--- a/tests/data/generex-ups_cs141.json
+++ b/tests/data/generex-ups_cs141.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/gwd.json b/tests/data/gwd.json
index b72d880aa0..ee724bc834 100644
--- a/tests/data/gwd.json
+++ b/tests/data/gwd.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 67375104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 67379200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 67383296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 67387392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 67391488,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 67395584,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 67399680,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 67403776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 67407872,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 67411968,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 67416064,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 67420160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 67424256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 67428352,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 67436544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 134266880,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 135938048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 67375104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 67379200,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 67383296,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 67387392,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 67391488,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 67395584,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 67399680,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 67403776,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 67407872,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 67411968,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 67416064,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 67420160,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 67424256,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 67428352,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 67432448,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 67436544,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 134266880,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 135938048,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/harmony-enhanced.json b/tests/data/harmony-enhanced.json
index 1dc3d47ce3..cb79d018f6 100644
--- a/tests/data/harmony-enhanced.json
+++ b/tests/data/harmony-enhanced.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/helios.json b/tests/data/helios.json
index db4ceda65c..432ed77d03 100644
--- a/tests/data/helios.json
+++ b/tests/data/helios.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/heliosip.json b/tests/data/heliosip.json
index 4d2a7e4232..201982a0b7 100644
--- a/tests/data/heliosip.json
+++ b/tests/data/heliosip.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/hiveos-wireless_320_n.json b/tests/data/hiveos-wireless_320_n.json
index ed5f42e3f9..85f1101152 100644
--- a/tests/data/hiveos-wireless_320_n.json
+++ b/tests/data/hiveos-wireless_320_n.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/hiveos-wireless_650ax.json b/tests/data/hiveos-wireless_650ax.json
index 01d96e6b0d..3c68161bcb 100644
--- a/tests/data/hiveos-wireless_650ax.json
+++ b/tests/data/hiveos-wireless_650ax.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/hpe-ilo_4.json b/tests/data/hpe-ilo_4.json
index 7281bfc51f..11bff12722 100644
--- a/tests/data/hpe-ilo_4.json
+++ b/tests/data/hpe-ilo_4.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1073741824,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "down",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "down",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "down",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "unknown",
                     "ifOperStatus_prev": "unknown",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wan miniport ",
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/hpe-pdumm.json b/tests/data/hpe-pdumm.json
index b99163c3c7..388de959fb 100644
--- a/tests/data/hpe-pdumm.json
+++ b/tests/data/hpe-pdumm.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ibm-i.json b/tests/data/ibm-i.json
index 980dfa7a1d..d364ce0b0c 100644
--- a/tests/data/ibm-i.json
+++ b/tests/data/ibm-i.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ibmc.json b/tests/data/ibmc.json
index f436181be1..b2c6398738 100644
--- a/tests/data/ibmc.json
+++ b/tests/data/ibmc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/iboot_pdu8-2n15.json b/tests/data/iboot_pdu8-2n15.json
index 2b9048a78f..d0e2b5d457 100644
--- a/tests/data/iboot_pdu8-2n15.json
+++ b/tests/data/iboot_pdu8-2n15.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ibos.json b/tests/data/ibos.json
index 052e5ca8ac..ec232fac3a 100644
--- a/tests/data/ibos.json
+++ b/tests/data/ibos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 19778,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 1210641083,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 5170762138,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 438172301,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 19816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 19816,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 2047707714,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 1781690194,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 1664301413,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 19816,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 19816,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 19806,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 19798,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 19816,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 19816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 1400746402,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 19816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 19816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 19816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 19794,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 14800767,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 69580793,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/icotera.json b/tests/data/icotera.json
index 6c5e32064d..b0d323a267 100644
--- a/tests/data/icotera.json
+++ b/tests/data/icotera.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ies5000_5005.json b/tests/data/ies5000_5005.json
index 3fe81a76eb..a017e46d82 100644
--- a/tests/data/ies5000_5005.json
+++ b/tests/data/ies5000_5005.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 627245,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": 51000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 51,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": 51000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 51,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": 51000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 51,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ies5000_5106.json b/tests/data/ies5000_5106.json
index 7fae65d49a..75376476b3 100644
--- a/tests/data/ies5000_5106.json
+++ b/tests/data/ies5000_5106.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 5,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 51000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 51,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": 4000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 4,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": 15000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 15,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ies52xxM_4206.json b/tests/data/ies52xxM_4206.json
index d7facc85f1..101586cf1e 100644
--- a/tests/data/ies52xxM_4206.json
+++ b/tests/data/ies52xxM_4206.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 10000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 10001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 10002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 10003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 10004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 10005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 10006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 10007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 10008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 10010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 10011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 10012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 10013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 10014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 10015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 10016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 20001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 20003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 20004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 20005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 20006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 20007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 20008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 20009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 20010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 20011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 20012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 20013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 20014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 20015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 20016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 30001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 30002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 30003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 30004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 30005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 30006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 30007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 30008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 30099,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 10000,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 6,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 10001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 10002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 10003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 10004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 10005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 10006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 10007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 10008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 10009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 10010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 10011,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 21800,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 10012,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 21806,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 10013,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 21995,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 10014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 10015,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 10560,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 10016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 10,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 20001,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 8362,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 20002,
                     "ifSpeed": 2500000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 2500,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 8482,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 20003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 20004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 20005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 39,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 20006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 20007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 20008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 20009,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 20010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 20011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 20012,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 20013,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 20014,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 20015,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 20016,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 30001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 25430,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 30002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 30003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 30004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 30005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 30006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 30007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 30008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 30099,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ifotec.json b/tests/data/ifotec.json
index c2bddd6aeb..ddfe68e58a 100644
--- a/tests/data/ifotec.json
+++ b/tests/data/ifotec.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/infinera-groove.json b/tests/data/infinera-groove.json
index a5bd416f8f..75876d81c4 100644
--- a/tests/data/infinera-groove.json
+++ b/tests/data/infinera-groove.json
@@ -54,9 +54,11 @@
                     "portName": null,
                     "ifIndex": 1001000003000,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -146,9 +148,7 @@
                     "ifOutMulticastPkts": 240349,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -161,9 +161,11 @@
                     "portName": null,
                     "ifIndex": 1001000004000,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -253,9 +255,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -268,9 +268,11 @@
                     "portName": null,
                     "ifIndex": 1001000005000,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -360,9 +362,7 @@
                     "ifOutMulticastPkts": 240355,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -375,9 +375,11 @@
                     "portName": null,
                     "ifIndex": 1001000006000,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -467,9 +469,7 @@
                     "ifOutMulticastPkts": 241726,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/innovaphone.json b/tests/data/innovaphone.json
index d44c81e878..fddaae5222 100644
--- a/tests/data/innovaphone.json
+++ b/tests/data/innovaphone.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "0",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/inteno_xg6846.json b/tests/data/inteno_xg6846.json
index 5e9caf6513..2e14f64af7 100644
--- a/tests/data/inteno_xg6846.json
+++ b/tests/data/inteno_xg6846.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ionos.json b/tests/data/ionos.json
index eb8887cf6f..4891101415 100644
--- a/tests/data/ionos.json
+++ b/tests/data/ionos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ios.json b/tests/data/ios.json
index ebbc8f02d4..35a9347329 100644
--- a/tests/data/ios.json
+++ b/tests/data/ios.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -120,9 +120,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -212,9 +214,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -227,9 +227,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -319,9 +321,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -334,9 +334,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -426,9 +428,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -441,9 +441,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -533,9 +535,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -548,9 +548,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -640,9 +642,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -655,9 +655,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -747,9 +749,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -762,9 +762,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -854,9 +856,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -869,9 +869,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -961,9 +963,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -976,9 +976,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1068,9 +1070,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1083,9 +1083,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1175,9 +1177,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1190,9 +1190,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1282,9 +1284,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1297,9 +1297,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1389,9 +1391,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1404,9 +1404,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1496,9 +1498,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1511,9 +1511,11 @@
                     "portName": null,
                     "ifIndex": 440,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1603,9 +1605,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1618,9 +1618,11 @@
                     "portName": null,
                     "ifIndex": 441,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1710,9 +1712,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1725,9 +1725,11 @@
                     "portName": null,
                     "ifIndex": 448,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1817,9 +1819,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1832,9 +1832,11 @@
                     "portName": null,
                     "ifIndex": 451,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1924,9 +1926,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1939,9 +1939,11 @@
                     "portName": null,
                     "ifIndex": 454,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2031,9 +2033,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2046,9 +2046,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2138,9 +2140,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2153,9 +2153,11 @@
                     "portName": null,
                     "ifIndex": 724,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2245,9 +2247,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2260,9 +2260,11 @@
                     "portName": null,
                     "ifIndex": 10101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2352,9 +2354,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2367,9 +2367,11 @@
                     "portName": null,
                     "ifIndex": 10102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2459,9 +2461,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2474,9 +2474,11 @@
                     "portName": null,
                     "ifIndex": 10103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2566,9 +2568,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2581,9 +2581,11 @@
                     "portName": null,
                     "ifIndex": 10104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2673,9 +2675,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2688,9 +2688,11 @@
                     "portName": null,
                     "ifIndex": 10105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2780,9 +2782,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2795,9 +2795,11 @@
                     "portName": null,
                     "ifIndex": 10106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2887,9 +2889,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2902,9 +2902,11 @@
                     "portName": null,
                     "ifIndex": 10107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2994,9 +2996,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3009,9 +3009,11 @@
                     "portName": null,
                     "ifIndex": 10108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3101,9 +3103,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3116,9 +3116,11 @@
                     "portName": null,
                     "ifIndex": 10109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3208,9 +3210,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3223,9 +3223,11 @@
                     "portName": null,
                     "ifIndex": 10110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3315,9 +3317,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3330,9 +3330,11 @@
                     "portName": null,
                     "ifIndex": 10111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3422,9 +3424,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3437,9 +3437,11 @@
                     "portName": null,
                     "ifIndex": 10112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3529,9 +3531,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3544,9 +3544,11 @@
                     "portName": null,
                     "ifIndex": 10113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3636,9 +3638,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3651,9 +3651,11 @@
                     "portName": null,
                     "ifIndex": 10114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3743,9 +3745,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3758,9 +3758,11 @@
                     "portName": null,
                     "ifIndex": 10115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3850,9 +3852,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3865,9 +3865,11 @@
                     "portName": null,
                     "ifIndex": 10116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3957,9 +3959,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3972,9 +3972,11 @@
                     "portName": null,
                     "ifIndex": 10501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4064,9 +4066,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4079,9 +4079,11 @@
                     "portName": null,
                     "ifIndex": 20567,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4171,9 +4173,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4190,9 +4190,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4282,9 +4284,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4297,9 +4297,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4389,9 +4391,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4404,9 +4404,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4496,9 +4498,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4511,9 +4511,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4603,9 +4605,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4618,9 +4618,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4710,9 +4712,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4725,9 +4725,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4817,9 +4819,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4832,9 +4832,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4924,9 +4926,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4939,9 +4939,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5031,9 +5033,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5046,9 +5046,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5138,9 +5140,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -5153,9 +5153,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5245,9 +5247,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -5260,9 +5260,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5352,9 +5354,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5367,9 +5367,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5459,9 +5461,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5474,9 +5474,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5566,9 +5568,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5581,9 +5581,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5673,9 +5675,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5688,9 +5688,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5780,9 +5782,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -5795,9 +5795,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -5887,9 +5889,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5902,9 +5902,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -5994,9 +5996,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6009,9 +6009,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6101,9 +6103,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6116,9 +6116,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6208,9 +6210,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6223,9 +6223,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -6315,9 +6317,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6330,9 +6330,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6422,9 +6424,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6437,9 +6437,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -6529,9 +6531,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6544,9 +6544,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6636,9 +6638,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6651,9 +6651,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6743,9 +6745,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6758,9 +6758,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6850,9 +6852,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
                     "port_descr_type": null,
@@ -6865,9 +6865,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6957,9 +6959,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6972,9 +6972,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7064,9 +7066,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
                     "port_descr_type": null,
@@ -7079,9 +7079,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7171,9 +7173,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
                     "port_descr_type": null,
@@ -7186,9 +7186,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -7278,9 +7280,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
                     "port_descr_type": null,
@@ -7293,9 +7293,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -7385,9 +7387,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7400,9 +7400,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -7492,9 +7494,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7507,9 +7507,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7599,9 +7601,7 @@
                     "ifOutMulticastPkts": 106862363,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7614,9 +7614,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7706,9 +7708,7 @@
                     "ifOutMulticastPkts": 46021236,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7721,9 +7721,11 @@
                     "portName": null,
                     "ifIndex": 10113,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7813,9 +7815,7 @@
                     "ifOutMulticastPkts": 1261386155,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7828,9 +7828,11 @@
                     "portName": null,
                     "ifIndex": 10114,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7920,9 +7922,7 @@
                     "ifOutMulticastPkts": 30117504,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7935,9 +7935,11 @@
                     "portName": null,
                     "ifIndex": 10115,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8027,9 +8029,7 @@
                     "ifOutMulticastPkts": 971126164,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8042,9 +8042,11 @@
                     "portName": null,
                     "ifIndex": 10116,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8134,9 +8136,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8149,9 +8149,11 @@
                     "portName": null,
                     "ifIndex": 10501,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8241,9 +8243,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8256,9 +8256,11 @@
                     "portName": null,
                     "ifIndex": 20567,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8348,9 +8350,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ios_2960x.json b/tests/data/ios_2960x.json
index f883548672..ca5b517403 100644
--- a/tests/data/ios_2960x.json
+++ b/tests/data/ios_2960x.json
@@ -145,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -254,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -363,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -472,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -581,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -690,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -799,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -908,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1017,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1126,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1235,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1344,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1453,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1562,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1671,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1780,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1889,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1998,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2107,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2216,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2325,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2434,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2543,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2652,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2761,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2870,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2979,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3088,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3197,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3306,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3415,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3524,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3633,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3742,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3851,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3960,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4069,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4178,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4287,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4396,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4505,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4614,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4723,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4832,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
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@@ -16296,7 +15998,7 @@
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@@ -16405,7 +16105,7 @@
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@@ -28925,9 +28397,7 @@
                     "ifOutMulticastPkts": 8751553,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29034,9 +28504,7 @@
                     "ifOutMulticastPkts": 8036608,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29143,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29252,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29361,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29470,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29579,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29688,9 +29146,7 @@
                     "ifOutMulticastPkts": 2023625,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29797,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29906,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +29467,7 @@
                     "ifOutMulticastPkts": 4121702,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30124,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30233,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30342,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30451,9 +29895,7 @@
                     "ifOutMulticastPkts": 15971829,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30560,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30669,9 +30109,7 @@
                     "ifOutMulticastPkts": 5986930,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30778,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30887,9 +30323,7 @@
                     "ifOutMulticastPkts": 7889557,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30996,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31105,9 +30537,7 @@
                     "ifOutMulticastPkts": 19039182,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31214,9 +30644,7 @@
                     "ifOutMulticastPkts": 3630392,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31323,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31432,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31541,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31650,9 +31072,7 @@
                     "ifOutMulticastPkts": 10655521,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31759,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31868,9 +31286,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ios_6500.json b/tests/data/ios_6500.json
index 0677e368e9..c1956f8f3c 100644
--- a/tests/data/ios_6500.json
+++ b/tests/data/ios_6500.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 251,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 253,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 415,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 417,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 418,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 464,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 465,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 477,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 487,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 494,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 495,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 496,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 497,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 538,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 542,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 543,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -4958,9 +4960,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 547,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -5065,9 +5067,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 548,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 549,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5279,9 +5281,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 550,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 551,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 552,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 553,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 554,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 555,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -5921,9 +5923,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 556,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6043,9 +6043,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6150,9 +6150,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 559,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6349,9 +6351,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6456,9 +6458,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6777,9 +6779,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 564,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 565,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 566,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 567,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 569,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 570,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 571,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 572,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 573,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 574,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 575,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 576,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -8168,9 +8170,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 577,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -8275,9 +8277,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 578,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 579,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 580,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 581,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 582,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 583,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8917,9 +8919,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 584,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9024,9 +9026,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 585,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9131,9 +9133,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 586,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 587,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 588,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 590,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 591,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 592,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 593,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 594,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 595,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 596,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 597,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 598,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 599,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 602,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 603,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 604,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 605,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 606,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 607,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 608,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 609,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 610,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 611,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 612,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 613,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 614,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 615,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 616,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 617,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 618,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 619,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 620,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 621,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 622,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 623,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 624,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 625,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 626,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 627,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 628,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 629,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 630,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 631,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 632,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 633,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 634,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -14374,9 +14376,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 635,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 636,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 637,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 638,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 640,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 641,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 642,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 643,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 644,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15459,9 +15459,11 @@
                     "portName": null,
                     "ifIndex": 645,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15551,9 +15553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15566,9 +15566,11 @@
                     "portName": null,
                     "ifIndex": 646,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15658,9 +15660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
                     "ifIndex": 647,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15765,9 +15767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15780,9 +15780,11 @@
                     "portName": null,
                     "ifIndex": 648,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15872,9 +15874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15887,9 +15887,11 @@
                     "portName": null,
                     "ifIndex": 649,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15979,9 +15981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15994,9 +15994,11 @@
                     "portName": null,
                     "ifIndex": 650,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16086,9 +16088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16101,9 +16101,11 @@
                     "portName": null,
                     "ifIndex": 651,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16193,9 +16195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16208,9 +16208,11 @@
                     "portName": null,
                     "ifIndex": 652,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16300,9 +16302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16315,9 +16315,11 @@
                     "portName": null,
                     "ifIndex": 653,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16407,9 +16409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 654,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16514,9 +16516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16529,9 +16529,11 @@
                     "portName": null,
                     "ifIndex": 655,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16621,9 +16623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16636,9 +16636,11 @@
                     "portName": null,
                     "ifIndex": 656,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16728,9 +16730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16743,9 +16743,11 @@
                     "portName": null,
                     "ifIndex": 657,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16835,9 +16837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
                     "ifIndex": 658,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16942,9 +16944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
                     "ifIndex": 659,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17049,9 +17051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
                     "ifIndex": 660,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17156,9 +17158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
                     "ifIndex": 661,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17263,9 +17265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
                     "ifIndex": 662,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17370,9 +17372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17385,9 +17385,11 @@
                     "portName": null,
                     "ifIndex": 663,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17477,9 +17479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17492,9 +17492,11 @@
                     "portName": null,
                     "ifIndex": 664,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17584,9 +17586,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -17599,9 +17599,11 @@
                     "portName": null,
                     "ifIndex": 665,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17691,9 +17693,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -17706,9 +17706,11 @@
                     "portName": null,
                     "ifIndex": 666,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -17798,9 +17800,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -17813,9 +17813,11 @@
                     "portName": null,
                     "ifIndex": 667,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -17905,9 +17907,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -17920,9 +17920,11 @@
                     "portName": null,
                     "ifIndex": 668,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18012,9 +18014,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18027,9 +18027,11 @@
                     "portName": null,
                     "ifIndex": 669,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18119,9 +18121,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18134,9 +18134,11 @@
                     "portName": null,
                     "ifIndex": 670,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18226,9 +18228,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18241,9 +18241,11 @@
                     "portName": null,
                     "ifIndex": 671,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -18333,9 +18335,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18348,9 +18348,11 @@
                     "portName": null,
                     "ifIndex": 672,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18440,9 +18442,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18455,9 +18455,11 @@
                     "portName": null,
                     "ifIndex": 673,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18547,9 +18549,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18562,9 +18562,11 @@
                     "portName": null,
                     "ifIndex": 674,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18654,9 +18656,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18669,9 +18669,11 @@
                     "portName": null,
                     "ifIndex": 675,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18761,9 +18763,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18776,9 +18776,11 @@
                     "portName": null,
                     "ifIndex": 676,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18868,9 +18870,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18883,9 +18883,11 @@
                     "portName": null,
                     "ifIndex": 677,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18975,9 +18977,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18990,9 +18990,11 @@
                     "portName": null,
                     "ifIndex": 678,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19082,9 +19084,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19097,9 +19097,11 @@
                     "portName": null,
                     "ifIndex": 679,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19189,9 +19191,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19204,9 +19204,11 @@
                     "portName": null,
                     "ifIndex": 680,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -19296,9 +19298,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19311,9 +19311,11 @@
                     "portName": null,
                     "ifIndex": 681,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19403,9 +19405,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19418,9 +19418,11 @@
                     "portName": null,
                     "ifIndex": 682,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19510,9 +19512,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19525,9 +19525,11 @@
                     "portName": null,
                     "ifIndex": 683,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19617,9 +19619,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19632,9 +19632,11 @@
                     "portName": null,
                     "ifIndex": 684,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19724,9 +19726,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19739,9 +19739,11 @@
                     "portName": null,
                     "ifIndex": 685,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19831,9 +19833,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19846,9 +19846,11 @@
                     "portName": null,
                     "ifIndex": 686,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19938,9 +19940,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19953,9 +19953,11 @@
                     "portName": null,
                     "ifIndex": 687,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20045,9 +20047,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20060,9 +20060,11 @@
                     "portName": null,
                     "ifIndex": 688,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20152,9 +20154,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20167,9 +20167,11 @@
                     "portName": null,
                     "ifIndex": 689,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20259,9 +20261,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20274,9 +20274,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20366,9 +20368,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20381,9 +20381,11 @@
                     "portName": null,
                     "ifIndex": 691,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -20473,9 +20475,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20488,9 +20488,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20580,9 +20582,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20595,9 +20595,11 @@
                     "portName": null,
                     "ifIndex": 693,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20687,9 +20689,7 @@
                     "ifOutMulticastPkts": null,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20702,9 +20702,11 @@
                     "portName": null,
                     "ifIndex": 694,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20794,9 +20796,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20809,9 +20809,11 @@
                     "portName": null,
                     "ifIndex": 695,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20901,9 +20903,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20916,9 +20916,11 @@
                     "portName": null,
                     "ifIndex": 696,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21008,9 +21010,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21023,9 +21023,11 @@
                     "portName": null,
                     "ifIndex": 697,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21115,9 +21117,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21130,9 +21130,11 @@
                     "portName": null,
                     "ifIndex": 698,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21222,9 +21224,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21237,9 +21237,11 @@
                     "portName": null,
                     "ifIndex": 699,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21329,9 +21331,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21344,9 +21344,11 @@
                     "portName": null,
                     "ifIndex": 700,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21436,9 +21438,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21451,9 +21451,11 @@
                     "portName": null,
                     "ifIndex": 701,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21543,9 +21545,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21558,9 +21558,11 @@
                     "portName": null,
                     "ifIndex": 702,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21650,9 +21652,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21665,9 +21665,11 @@
                     "portName": null,
                     "ifIndex": 703,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21757,9 +21759,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21772,9 +21772,11 @@
                     "portName": null,
                     "ifIndex": 704,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21864,9 +21866,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21879,9 +21879,11 @@
                     "portName": null,
                     "ifIndex": 705,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21971,9 +21973,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21986,9 +21986,11 @@
                     "portName": null,
                     "ifIndex": 706,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22078,9 +22080,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22093,9 +22093,11 @@
                     "portName": null,
                     "ifIndex": 707,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22185,9 +22187,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22200,9 +22200,11 @@
                     "portName": null,
                     "ifIndex": 708,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22292,9 +22294,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22307,9 +22307,11 @@
                     "portName": null,
                     "ifIndex": 709,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22399,9 +22401,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22414,9 +22414,11 @@
                     "portName": null,
                     "ifIndex": 710,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22506,9 +22508,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22521,9 +22521,11 @@
                     "portName": null,
                     "ifIndex": 711,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22613,9 +22615,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22628,9 +22628,11 @@
                     "portName": null,
                     "ifIndex": 712,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22720,9 +22722,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22735,9 +22735,11 @@
                     "portName": null,
                     "ifIndex": 713,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22827,9 +22829,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22842,9 +22842,11 @@
                     "portName": null,
                     "ifIndex": 714,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22934,9 +22936,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22949,9 +22949,11 @@
                     "portName": null,
                     "ifIndex": 715,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23041,9 +23043,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23056,9 +23056,11 @@
                     "portName": null,
                     "ifIndex": 716,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23148,9 +23150,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23163,9 +23163,11 @@
                     "portName": null,
                     "ifIndex": 717,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23255,9 +23257,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23270,9 +23270,11 @@
                     "portName": null,
                     "ifIndex": 718,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23362,9 +23364,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23377,9 +23377,11 @@
                     "portName": null,
                     "ifIndex": 719,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23469,9 +23471,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23484,9 +23484,11 @@
                     "portName": null,
                     "ifIndex": 720,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23576,9 +23578,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23591,9 +23591,11 @@
                     "portName": null,
                     "ifIndex": 721,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23683,9 +23685,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23698,9 +23698,11 @@
                     "portName": null,
                     "ifIndex": 722,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23790,9 +23792,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23805,9 +23805,11 @@
                     "portName": null,
                     "ifIndex": 723,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23897,9 +23899,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23912,9 +23912,11 @@
                     "portName": null,
                     "ifIndex": 724,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24004,9 +24006,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24019,9 +24019,11 @@
                     "portName": null,
                     "ifIndex": 725,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24111,9 +24113,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24126,9 +24126,11 @@
                     "portName": null,
                     "ifIndex": 726,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24218,9 +24220,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24233,9 +24233,11 @@
                     "portName": null,
                     "ifIndex": 727,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24325,9 +24327,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24340,9 +24340,11 @@
                     "portName": null,
                     "ifIndex": 728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24432,9 +24434,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24447,9 +24447,11 @@
                     "portName": null,
                     "ifIndex": 729,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24539,9 +24541,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24554,9 +24554,11 @@
                     "portName": null,
                     "ifIndex": 730,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24646,9 +24648,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24661,9 +24661,11 @@
                     "portName": null,
                     "ifIndex": 731,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24753,9 +24755,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24768,9 +24768,11 @@
                     "portName": null,
                     "ifIndex": 732,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24860,9 +24862,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24875,9 +24875,11 @@
                     "portName": null,
                     "ifIndex": 733,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24967,9 +24969,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24982,9 +24982,11 @@
                     "portName": null,
                     "ifIndex": 734,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25074,9 +25076,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25089,9 +25089,11 @@
                     "portName": null,
                     "ifIndex": 735,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25181,9 +25183,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25196,9 +25196,11 @@
                     "portName": null,
                     "ifIndex": 736,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25288,9 +25290,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25303,9 +25303,11 @@
                     "portName": null,
                     "ifIndex": 737,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25395,9 +25397,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25410,9 +25410,11 @@
                     "portName": null,
                     "ifIndex": 738,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25502,9 +25504,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25517,9 +25517,11 @@
                     "portName": null,
                     "ifIndex": 739,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25609,9 +25611,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25624,9 +25624,11 @@
                     "portName": null,
                     "ifIndex": 740,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25716,9 +25718,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25731,9 +25731,11 @@
                     "portName": null,
                     "ifIndex": 741,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25823,9 +25825,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25838,9 +25838,11 @@
                     "portName": null,
                     "ifIndex": 742,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25930,9 +25932,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25945,9 +25945,11 @@
                     "portName": null,
                     "ifIndex": 743,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26037,9 +26039,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26052,9 +26052,11 @@
                     "portName": null,
                     "ifIndex": 744,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26144,9 +26146,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26159,9 +26159,11 @@
                     "portName": null,
                     "ifIndex": 745,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26251,9 +26253,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26266,9 +26266,11 @@
                     "portName": null,
                     "ifIndex": 746,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26358,9 +26360,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26373,9 +26373,11 @@
                     "portName": null,
                     "ifIndex": 747,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26465,9 +26467,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26480,9 +26480,11 @@
                     "portName": null,
                     "ifIndex": 748,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26572,9 +26574,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26587,9 +26587,11 @@
                     "portName": null,
                     "ifIndex": 749,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26679,9 +26681,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26694,9 +26694,11 @@
                     "portName": null,
                     "ifIndex": 750,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26786,9 +26788,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26801,9 +26801,11 @@
                     "portName": null,
                     "ifIndex": 751,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26893,9 +26895,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26908,9 +26908,11 @@
                     "portName": null,
                     "ifIndex": 769,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27000,9 +27002,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27015,9 +27015,11 @@
                     "portName": null,
                     "ifIndex": 770,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -27107,9 +27109,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27122,9 +27122,11 @@
                     "portName": null,
                     "ifIndex": 774,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -27214,9 +27216,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27229,9 +27229,11 @@
                     "portName": null,
                     "ifIndex": 775,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -27321,9 +27323,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27336,9 +27336,11 @@
                     "portName": null,
                     "ifIndex": 776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -27428,9 +27430,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27443,9 +27443,11 @@
                     "portName": null,
                     "ifIndex": 785,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27535,9 +27537,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27550,9 +27550,11 @@
                     "portName": null,
                     "ifIndex": 792,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -27642,9 +27644,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27657,9 +27657,11 @@
                     "portName": null,
                     "ifIndex": 793,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27749,9 +27751,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27764,9 +27764,11 @@
                     "portName": null,
                     "ifIndex": 794,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27856,9 +27858,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27871,9 +27871,11 @@
                     "portName": null,
                     "ifIndex": 801,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27963,9 +27965,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27978,9 +27978,11 @@
                     "portName": null,
                     "ifIndex": 802,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28070,9 +28072,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28085,9 +28085,11 @@
                     "portName": null,
                     "ifIndex": 803,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28177,9 +28179,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28192,9 +28192,11 @@
                     "portName": null,
                     "ifIndex": 804,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28284,9 +28286,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28299,9 +28299,11 @@
                     "portName": null,
                     "ifIndex": 805,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -28391,9 +28393,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28406,9 +28406,11 @@
                     "portName": null,
                     "ifIndex": 806,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28498,9 +28500,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28513,9 +28513,11 @@
                     "portName": null,
                     "ifIndex": 807,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28605,9 +28607,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28620,9 +28620,11 @@
                     "portName": null,
                     "ifIndex": 810,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28712,9 +28714,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28727,9 +28727,11 @@
                     "portName": null,
                     "ifIndex": 811,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28819,9 +28821,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28834,9 +28834,11 @@
                     "portName": null,
                     "ifIndex": 814,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28926,9 +28928,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28941,9 +28941,11 @@
                     "portName": null,
                     "ifIndex": 815,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29033,9 +29035,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29048,9 +29048,11 @@
                     "portName": null,
                     "ifIndex": 818,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29140,9 +29142,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29155,9 +29155,11 @@
                     "portName": null,
                     "ifIndex": 834,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29247,9 +29249,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29262,9 +29262,11 @@
                     "portName": null,
                     "ifIndex": 835,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29354,9 +29356,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29369,9 +29369,11 @@
                     "portName": null,
                     "ifIndex": 836,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29461,9 +29463,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29476,9 +29476,11 @@
                     "portName": null,
                     "ifIndex": 838,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29568,9 +29570,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29583,9 +29583,11 @@
                     "portName": null,
                     "ifIndex": 848,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29675,9 +29677,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29690,9 +29690,11 @@
                     "portName": null,
                     "ifIndex": 849,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29782,9 +29784,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29797,9 +29797,11 @@
                     "portName": null,
                     "ifIndex": 850,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29889,9 +29891,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29904,9 +29904,11 @@
                     "portName": null,
                     "ifIndex": 854,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29996,9 +29998,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30011,9 +30011,11 @@
                     "portName": null,
                     "ifIndex": 871,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30103,9 +30105,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30118,9 +30118,11 @@
                     "portName": null,
                     "ifIndex": 872,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30210,9 +30212,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30225,9 +30225,11 @@
                     "portName": null,
                     "ifIndex": 874,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30317,9 +30319,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30332,9 +30332,11 @@
                     "portName": null,
                     "ifIndex": 875,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30424,9 +30426,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30439,9 +30439,11 @@
                     "portName": null,
                     "ifIndex": 876,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30531,9 +30533,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30546,9 +30546,11 @@
                     "portName": null,
                     "ifIndex": 877,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30638,9 +30640,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30653,9 +30653,11 @@
                     "portName": null,
                     "ifIndex": 883,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30745,9 +30747,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30760,9 +30760,11 @@
                     "portName": null,
                     "ifIndex": 885,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30852,9 +30854,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30867,9 +30867,11 @@
                     "portName": null,
                     "ifIndex": 907,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30959,9 +30961,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30974,9 +30974,11 @@
                     "portName": null,
                     "ifIndex": 908,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31066,9 +31068,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31081,9 +31081,11 @@
                     "portName": null,
                     "ifIndex": 909,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31173,9 +31175,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31188,9 +31188,11 @@
                     "portName": null,
                     "ifIndex": 919,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31280,9 +31282,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31295,9 +31295,11 @@
                     "portName": null,
                     "ifIndex": 920,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31387,9 +31389,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31402,9 +31402,11 @@
                     "portName": null,
                     "ifIndex": 921,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31494,9 +31496,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31509,9 +31509,11 @@
                     "portName": null,
                     "ifIndex": 925,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31601,9 +31603,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31616,9 +31616,11 @@
                     "portName": null,
                     "ifIndex": 926,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31708,9 +31710,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31723,9 +31723,11 @@
                     "portName": null,
                     "ifIndex": 927,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31815,9 +31817,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31830,9 +31830,11 @@
                     "portName": null,
                     "ifIndex": 938,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -31922,9 +31924,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31937,9 +31937,11 @@
                     "portName": null,
                     "ifIndex": 939,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -32029,9 +32031,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32044,9 +32044,11 @@
                     "portName": null,
                     "ifIndex": 940,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -32136,9 +32138,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32151,9 +32151,11 @@
                     "portName": null,
                     "ifIndex": 941,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -32243,9 +32245,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32258,9 +32258,11 @@
                     "portName": null,
                     "ifIndex": 947,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -32350,9 +32352,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32365,9 +32365,11 @@
                     "portName": null,
                     "ifIndex": 948,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -32457,9 +32459,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 251,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 253,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 395,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 396,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 415,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34937,9 +34937,11 @@
                     "portName": null,
                     "ifIndex": 417,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35029,9 +35031,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35044,9 +35044,11 @@
                     "portName": null,
                     "ifIndex": 418,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35136,9 +35138,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35151,9 +35151,11 @@
                     "portName": null,
                     "ifIndex": 464,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35243,9 +35245,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35258,9 +35258,11 @@
                     "portName": null,
                     "ifIndex": 465,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35350,9 +35352,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35365,9 +35365,11 @@
                     "portName": null,
                     "ifIndex": 477,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35457,9 +35459,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35472,9 +35472,11 @@
                     "portName": null,
                     "ifIndex": 487,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35564,9 +35566,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35579,9 +35579,11 @@
                     "portName": null,
                     "ifIndex": 494,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35671,9 +35673,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35686,9 +35686,11 @@
                     "portName": null,
                     "ifIndex": 495,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35778,9 +35780,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35793,9 +35793,11 @@
                     "portName": null,
                     "ifIndex": 496,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35885,9 +35887,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35900,9 +35900,11 @@
                     "portName": null,
                     "ifIndex": 497,
                     "ifSpeed": 3000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 3000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35992,9 +35994,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36007,9 +36007,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36099,9 +36101,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36114,9 +36114,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36206,9 +36208,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36221,9 +36221,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36313,9 +36315,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36328,9 +36328,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36420,9 +36422,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36435,9 +36435,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36527,9 +36529,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36542,9 +36542,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -36634,9 +36636,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36649,9 +36649,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36741,9 +36743,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36756,9 +36756,11 @@
                     "portName": null,
                     "ifIndex": 535,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36848,9 +36850,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36863,9 +36863,11 @@
                     "portName": null,
                     "ifIndex": 536,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36955,9 +36957,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36970,9 +36970,11 @@
                     "portName": null,
                     "ifIndex": 538,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37062,9 +37064,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37077,9 +37077,11 @@
                     "portName": null,
                     "ifIndex": 542,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37169,9 +37171,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37184,9 +37184,11 @@
                     "portName": null,
                     "ifIndex": 543,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37276,9 +37278,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37291,9 +37291,11 @@
                     "portName": null,
                     "ifIndex": 544,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37383,9 +37385,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37398,9 +37398,11 @@
                     "portName": null,
                     "ifIndex": 547,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37490,9 +37492,7 @@
                     "ifOutMulticastPkts": 2126271681,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37505,9 +37505,11 @@
                     "portName": null,
                     "ifIndex": 548,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -37597,9 +37599,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37612,9 +37612,11 @@
                     "portName": null,
                     "ifIndex": 549,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -37704,9 +37706,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37719,9 +37719,11 @@
                     "portName": null,
                     "ifIndex": 550,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37811,9 +37813,7 @@
                     "ifOutMulticastPkts": 337652510,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37826,9 +37826,11 @@
                     "portName": null,
                     "ifIndex": 551,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -37918,9 +37920,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37933,9 +37933,11 @@
                     "portName": null,
                     "ifIndex": 552,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -38025,9 +38027,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38040,9 +38040,11 @@
                     "portName": null,
                     "ifIndex": 553,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -38132,9 +38134,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38147,9 +38147,11 @@
                     "portName": null,
                     "ifIndex": 554,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -38239,9 +38241,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38254,9 +38254,11 @@
                     "portName": null,
                     "ifIndex": 555,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38346,9 +38348,7 @@
                     "ifOutMulticastPkts": 98858014,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38361,9 +38361,11 @@
                     "portName": null,
                     "ifIndex": 556,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38453,9 +38455,7 @@
                     "ifOutMulticastPkts": 27823740,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38468,9 +38468,11 @@
                     "portName": null,
                     "ifIndex": 557,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38560,9 +38562,7 @@
                     "ifOutMulticastPkts": 49844674,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38575,9 +38575,11 @@
                     "portName": null,
                     "ifIndex": 558,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38667,9 +38669,7 @@
                     "ifOutMulticastPkts": 49844614,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38682,9 +38682,11 @@
                     "portName": null,
                     "ifIndex": 559,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38774,9 +38776,7 @@
                     "ifOutMulticastPkts": 37892172,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38789,9 +38789,11 @@
                     "portName": null,
                     "ifIndex": 560,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38881,9 +38883,7 @@
                     "ifOutMulticastPkts": 37526815,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38896,9 +38896,11 @@
                     "portName": null,
                     "ifIndex": 561,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38988,9 +38990,7 @@
                     "ifOutMulticastPkts": 109312815,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39003,9 +39003,11 @@
                     "portName": null,
                     "ifIndex": 562,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39095,9 +39097,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39110,9 +39110,11 @@
                     "portName": null,
                     "ifIndex": 563,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39202,9 +39204,7 @@
                     "ifOutMulticastPkts": 109306058,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39217,9 +39217,11 @@
                     "portName": null,
                     "ifIndex": 564,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39309,9 +39311,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39324,9 +39324,11 @@
                     "portName": null,
                     "ifIndex": 565,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39416,9 +39418,7 @@
                     "ifOutMulticastPkts": 82701187,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39431,9 +39431,11 @@
                     "portName": null,
                     "ifIndex": 566,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39523,9 +39525,7 @@
                     "ifOutMulticastPkts": 805776070,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -39538,9 +39538,11 @@
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -39630,9 +39632,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -39645,9 +39645,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "up",
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -39752,9 +39752,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -39844,9 +39846,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -39859,9 +39859,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -39951,9 +39953,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -39966,9 +39966,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifOperStatus": "up",
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@@ -40058,9 +40060,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -40073,9 +40073,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -40165,9 +40167,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -40180,9 +40180,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40272,9 +40274,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -40287,9 +40287,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -40379,9 +40381,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -40394,9 +40394,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -40486,9 +40488,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -40501,9 +40501,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -40593,9 +40595,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -40608,9 +40608,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -40700,9 +40702,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -40715,9 +40715,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "up",
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@@ -40807,9 +40809,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -40822,9 +40822,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -40914,9 +40916,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -40929,9 +40929,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -41021,9 +41023,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -41036,9 +41036,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "up",
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@@ -41128,9 +41130,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -41143,9 +41143,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -41235,9 +41237,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -41250,9 +41250,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -41342,9 +41344,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -41357,9 +41357,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
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                     "ifOperStatus": "up",
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@@ -41449,9 +41451,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
                     "port_descr_type": null,
@@ -41464,9 +41464,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -41556,9 +41558,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41571,9 +41571,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41663,9 +41665,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41678,9 +41678,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41770,9 +41772,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41785,9 +41785,11 @@
                     "portName": null,
                     "ifIndex": 588,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41877,9 +41879,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41892,9 +41892,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41984,9 +41986,7 @@
                     "ifOutMulticastPkts": 603474684,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41999,9 +41999,11 @@
                     "portName": null,
                     "ifIndex": 590,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42091,9 +42093,7 @@
                     "ifOutMulticastPkts": 27872168,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42106,9 +42106,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42198,9 +42200,7 @@
                     "ifOutMulticastPkts": 27872154,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42213,9 +42213,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42305,9 +42307,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42320,9 +42320,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42412,9 +42414,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42427,9 +42427,11 @@
                     "portName": null,
                     "ifIndex": 594,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42519,9 +42521,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42534,9 +42534,11 @@
                     "portName": null,
                     "ifIndex": 595,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42626,9 +42628,7 @@
                     "ifOutMulticastPkts": 49275607,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -42641,9 +42641,11 @@
                     "portName": null,
                     "ifIndex": 596,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42733,9 +42735,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42748,9 +42748,11 @@
                     "portName": null,
                     "ifIndex": 597,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42840,9 +42842,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42855,9 +42855,11 @@
                     "portName": null,
                     "ifIndex": 598,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42947,9 +42949,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -42962,9 +42962,11 @@
                     "portName": null,
                     "ifIndex": 599,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43054,9 +43056,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -43069,9 +43069,11 @@
                     "portName": null,
                     "ifIndex": 600,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43161,9 +43163,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43176,9 +43176,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43268,9 +43270,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -43283,9 +43283,11 @@
                     "portName": null,
                     "ifIndex": 602,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -43375,9 +43377,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -43390,9 +43390,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43482,9 +43484,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43497,9 +43497,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43589,9 +43591,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43604,9 +43604,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43696,9 +43698,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43711,9 +43711,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43803,9 +43805,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43818,9 +43818,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43910,9 +43912,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43925,9 +43925,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44017,9 +44019,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44032,9 +44032,11 @@
                     "portName": null,
                     "ifIndex": 609,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44124,9 +44126,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44139,9 +44139,11 @@
                     "portName": null,
                     "ifIndex": 610,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44231,9 +44233,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44246,9 +44246,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44338,9 +44340,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44353,9 +44353,11 @@
                     "portName": null,
                     "ifIndex": 612,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44445,9 +44447,7 @@
                     "ifOutMulticastPkts": 109312830,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44460,9 +44460,11 @@
                     "portName": null,
                     "ifIndex": 613,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44552,9 +44554,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44567,9 +44567,11 @@
                     "portName": null,
                     "ifIndex": 614,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44659,9 +44661,7 @@
                     "ifOutMulticastPkts": 109312752,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44674,9 +44674,11 @@
                     "portName": null,
                     "ifIndex": 615,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44766,9 +44768,7 @@
                     "ifOutMulticastPkts": 3421065,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44781,9 +44781,11 @@
                     "portName": null,
                     "ifIndex": 616,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44873,9 +44875,7 @@
                     "ifOutMulticastPkts": 109185823,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44888,9 +44888,11 @@
                     "portName": null,
                     "ifIndex": 617,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44980,9 +44982,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44995,9 +44995,11 @@
                     "portName": null,
                     "ifIndex": 618,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45087,9 +45089,7 @@
                     "ifOutMulticastPkts": 49667591,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45102,9 +45102,11 @@
                     "portName": null,
                     "ifIndex": 619,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45194,9 +45196,7 @@
                     "ifOutMulticastPkts": 109312734,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45209,9 +45209,11 @@
                     "portName": null,
                     "ifIndex": 620,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45301,9 +45303,7 @@
                     "ifOutMulticastPkts": 108509835,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45316,9 +45316,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45408,9 +45410,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45423,9 +45423,11 @@
                     "portName": null,
                     "ifIndex": 622,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45515,9 +45517,7 @@
                     "ifOutMulticastPkts": 36854750,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45530,9 +45530,11 @@
                     "portName": null,
                     "ifIndex": 623,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45622,9 +45624,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45637,9 +45637,11 @@
                     "portName": null,
                     "ifIndex": 624,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45729,9 +45731,7 @@
                     "ifOutMulticastPkts": 11504135,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -45744,9 +45744,11 @@
                     "portName": null,
                     "ifIndex": 625,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45836,9 +45838,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -45851,9 +45851,11 @@
                     "portName": null,
                     "ifIndex": 626,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45943,9 +45945,7 @@
                     "ifOutMulticastPkts": 49844413,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -45958,9 +45958,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46050,9 +46052,7 @@
                     "ifOutMulticastPkts": 49667565,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -46065,9 +46065,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46157,9 +46159,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -46172,9 +46172,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46264,9 +46266,7 @@
                     "ifOutMulticastPkts": 49668203,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -46279,9 +46279,11 @@
                     "portName": null,
                     "ifIndex": 630,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46371,9 +46373,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46386,9 +46386,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46478,9 +46480,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46493,9 +46493,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46585,9 +46587,7 @@
                     "ifOutMulticastPkts": 49665976,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46600,9 +46600,11 @@
                     "portName": null,
                     "ifIndex": 633,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46692,9 +46694,7 @@
                     "ifOutMulticastPkts": 2557879229,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46707,9 +46707,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46799,9 +46801,7 @@
                     "ifOutMulticastPkts": 607460359,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46814,9 +46814,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46906,9 +46908,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46921,9 +46921,11 @@
                     "portName": null,
                     "ifIndex": 636,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47013,9 +47015,7 @@
                     "ifOutMulticastPkts": 71980,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47028,9 +47028,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47120,9 +47122,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47135,9 +47135,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47227,9 +47229,7 @@
                     "ifOutMulticastPkts": 515304102,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47242,9 +47242,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47334,9 +47336,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47349,9 +47349,11 @@
                     "portName": null,
                     "ifIndex": 640,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47441,9 +47443,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47456,9 +47456,11 @@
                     "portName": null,
                     "ifIndex": 641,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47548,9 +47550,7 @@
                     "ifOutMulticastPkts": 11238367,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47563,9 +47563,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47655,9 +47657,7 @@
                     "ifOutMulticastPkts": 13487652,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47670,9 +47670,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47762,9 +47764,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47777,9 +47777,11 @@
                     "portName": null,
                     "ifIndex": 644,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47869,9 +47871,7 @@
                     "ifOutMulticastPkts": 109312735,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47884,9 +47884,11 @@
                     "portName": null,
                     "ifIndex": 645,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -47976,9 +47978,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47991,9 +47991,11 @@
                     "portName": null,
                     "ifIndex": 646,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -48083,9 +48085,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48098,9 +48098,11 @@
                     "portName": null,
                     "ifIndex": 647,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48190,9 +48192,7 @@
                     "ifOutMulticastPkts": 13946042,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48205,9 +48205,11 @@
                     "portName": null,
                     "ifIndex": 648,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -48297,9 +48299,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48312,9 +48312,11 @@
                     "portName": null,
                     "ifIndex": 649,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48404,9 +48406,7 @@
                     "ifOutMulticastPkts": 603472267,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48419,9 +48419,11 @@
                     "portName": null,
                     "ifIndex": 650,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -48511,9 +48513,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48526,9 +48526,11 @@
                     "portName": null,
                     "ifIndex": 651,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48618,9 +48620,7 @@
                     "ifOutMulticastPkts": 480580154,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48633,9 +48633,11 @@
                     "portName": null,
                     "ifIndex": 652,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -48725,9 +48727,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48740,9 +48740,11 @@
                     "portName": null,
                     "ifIndex": 653,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48832,9 +48834,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
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@@ -48847,9 +48847,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -49061,9 +49061,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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@@ -49168,9 +49168,11 @@
                     "portName": null,
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                 {
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@@ -49275,9 +49275,11 @@
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-                    "ifHighSpeed_prev": null
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                     "portName": null,
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-                    "ifHighSpeed_prev": null
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@@ -49489,9 +49489,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -49596,9 +49596,11 @@
                     "portName": null,
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@@ -49688,9 +49690,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -49703,9 +49703,11 @@
                     "portName": null,
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                 {
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@@ -49810,9 +49810,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -49917,9 +49917,11 @@
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@@ -50009,9 +50011,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50024,9 +50024,11 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50131,9 +50131,11 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50238,9 +50238,11 @@
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                 {
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@@ -50345,9 +50345,11 @@
                     "portName": null,
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@@ -50437,9 +50439,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50452,9 +50452,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifHighSpeed": 100,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50559,9 +50559,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50666,9 +50666,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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@@ -50758,9 +50760,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50773,9 +50773,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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@@ -50865,9 +50867,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -50880,9 +50880,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "down",
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@@ -50972,9 +50974,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -50987,9 +50987,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifHighSpeed": 100,
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                     "ifOperStatus": "up",
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@@ -51079,9 +51081,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -51094,9 +51094,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
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@@ -51186,9 +51188,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -51201,9 +51201,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -51293,9 +51295,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -51308,9 +51308,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -51400,9 +51402,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -51415,9 +51415,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -51507,9 +51509,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -51522,9 +51522,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -51614,9 +51616,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -51629,9 +51629,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifHighSpeed": 100,
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                     "ifOperStatus": "up",
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@@ -51721,9 +51723,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -51736,9 +51736,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -51828,9 +51830,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -51843,9 +51843,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -51935,9 +51937,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -51950,9 +51950,11 @@
                     "portName": null,
                     "ifIndex": 683,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52042,9 +52044,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52057,9 +52057,11 @@
                     "portName": null,
                     "ifIndex": 684,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52149,9 +52151,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52164,9 +52164,11 @@
                     "portName": null,
                     "ifIndex": 685,
                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52256,9 +52258,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52271,9 +52271,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52363,9 +52365,7 @@
                     "ifOutMulticastPkts": 51069053,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52378,9 +52378,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52470,9 +52472,7 @@
                     "ifOutMulticastPkts": 51067103,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52485,9 +52485,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52577,9 +52579,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -52592,9 +52592,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52684,9 +52686,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -52699,9 +52699,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52791,9 +52793,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -52806,9 +52806,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52898,9 +52900,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -52913,9 +52913,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53005,9 +53007,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53020,9 +53020,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53112,9 +53114,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -53127,9 +53127,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -53219,9 +53221,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -53234,9 +53234,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -53326,9 +53328,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53341,9 +53341,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53433,9 +53435,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53448,9 +53448,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -53540,9 +53542,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -53555,9 +53555,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53647,9 +53649,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53662,9 +53662,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53754,9 +53756,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53769,9 +53769,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53861,9 +53863,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53876,9 +53876,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -53968,9 +53970,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53983,9 +53983,11 @@
                     "portName": null,
                     "ifIndex": 702,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -54075,9 +54077,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54090,9 +54090,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -54182,9 +54184,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54197,9 +54197,11 @@
                     "portName": null,
                     "ifIndex": 704,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54289,9 +54291,7 @@
                     "ifOutMulticastPkts": 515305600,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54304,9 +54304,11 @@
                     "portName": null,
                     "ifIndex": 705,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54396,9 +54398,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54411,9 +54411,11 @@
                     "portName": null,
                     "ifIndex": 706,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54503,9 +54505,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54518,9 +54518,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54610,9 +54612,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54625,9 +54625,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -54717,9 +54719,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54732,9 +54732,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54824,9 +54826,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54839,9 +54839,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54931,9 +54933,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54946,9 +54946,11 @@
                     "portName": null,
                     "ifIndex": 711,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -55038,9 +55040,7 @@
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                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "up",
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@@ -55160,9 +55160,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -55267,9 +55267,11 @@
                     "portName": null,
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@@ -55374,9 +55374,11 @@
                     "portName": null,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -55481,9 +55481,11 @@
                     "portName": null,
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@@ -55573,9 +55575,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -55588,9 +55588,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -55695,9 +55695,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -55802,9 +55802,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifOperStatus": "up",
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@@ -55894,9 +55896,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -55909,9 +55909,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "down",
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@@ -56001,9 +56003,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56016,9 +56016,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifOperStatus": "up",
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@@ -56108,9 +56110,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56123,9 +56123,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifOperStatus": "up",
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@@ -56215,9 +56217,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56230,9 +56230,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifOperStatus": "up",
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@@ -56322,9 +56324,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -56337,9 +56337,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -56429,9 +56431,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56444,9 +56444,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -56536,9 +56538,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56551,9 +56551,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -56643,9 +56645,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56658,9 +56658,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -56750,9 +56752,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56765,9 +56765,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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@@ -56857,9 +56859,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -56872,9 +56872,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -56964,9 +56966,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -56979,9 +56979,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -57071,9 +57073,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -57086,9 +57086,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -57178,9 +57180,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -57193,9 +57193,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -57285,9 +57287,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -57300,9 +57300,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
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                     "ifOperStatus": "up",
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@@ -57392,9 +57394,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -57407,9 +57407,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
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                     "ifOperStatus": "up",
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@@ -57499,9 +57501,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -57514,9 +57514,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -57606,9 +57608,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -57621,9 +57621,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifOperStatus": "up",
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@@ -57713,9 +57715,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -57728,9 +57728,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -57820,9 +57822,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -57835,9 +57835,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -57927,9 +57929,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -57942,9 +57942,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -58034,9 +58036,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -58049,9 +58049,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -58141,9 +58143,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -58156,9 +58156,11 @@
                     "portName": null,
                     "ifIndex": 741,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -58248,9 +58250,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -58263,9 +58263,11 @@
                     "portName": null,
                     "ifIndex": 742,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -58355,9 +58357,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -58370,9 +58370,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -58462,9 +58464,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -58477,9 +58477,11 @@
                     "portName": null,
                     "ifIndex": 744,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -58569,9 +58571,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -58584,9 +58584,11 @@
                     "portName": null,
                     "ifIndex": 745,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -58676,9 +58678,7 @@
                     "ifOutMulticastPkts": 49669046,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -58691,9 +58691,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -58783,9 +58785,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -58798,9 +58798,11 @@
                     "portName": null,
                     "ifIndex": 747,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -58890,9 +58892,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -58905,9 +58905,11 @@
                     "portName": null,
                     "ifIndex": 748,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -58997,9 +58999,7 @@
                     "ifOutMulticastPkts": 452277840,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59012,9 +59012,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59104,9 +59106,7 @@
                     "ifOutMulticastPkts": 11860722,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59119,9 +59119,11 @@
                     "portName": null,
                     "ifIndex": 750,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59211,9 +59213,7 @@
                     "ifOutMulticastPkts": 3411580,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59226,9 +59226,11 @@
                     "portName": null,
                     "ifIndex": 751,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59318,9 +59320,7 @@
                     "ifOutMulticastPkts": 110714312,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59333,9 +59333,11 @@
                     "portName": null,
                     "ifIndex": 769,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59425,9 +59427,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59440,9 +59440,11 @@
                     "portName": null,
                     "ifIndex": 770,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59532,9 +59534,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59547,9 +59547,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59639,9 +59641,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59654,9 +59654,11 @@
                     "portName": null,
                     "ifIndex": 775,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59746,9 +59748,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59761,9 +59761,11 @@
                     "portName": null,
                     "ifIndex": 776,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59853,9 +59855,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59868,9 +59868,11 @@
                     "portName": null,
                     "ifIndex": 785,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -59960,9 +59962,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -59975,9 +59975,11 @@
                     "portName": null,
                     "ifIndex": 792,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60067,9 +60069,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60082,9 +60082,11 @@
                     "portName": null,
                     "ifIndex": 793,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60174,9 +60176,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60189,9 +60189,11 @@
                     "portName": null,
                     "ifIndex": 794,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60281,9 +60283,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60296,9 +60296,11 @@
                     "portName": null,
                     "ifIndex": 801,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60388,9 +60390,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60403,9 +60403,11 @@
                     "portName": null,
                     "ifIndex": 802,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60495,9 +60497,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60510,9 +60510,11 @@
                     "portName": null,
                     "ifIndex": 803,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60602,9 +60604,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60617,9 +60617,11 @@
                     "portName": null,
                     "ifIndex": 804,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60709,9 +60711,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60724,9 +60724,11 @@
                     "portName": null,
                     "ifIndex": 805,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60816,9 +60818,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60831,9 +60831,11 @@
                     "portName": null,
                     "ifIndex": 806,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -60923,9 +60925,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -60938,9 +60938,11 @@
                     "portName": null,
                     "ifIndex": 807,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61030,9 +61032,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61045,9 +61045,11 @@
                     "portName": null,
                     "ifIndex": 810,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61137,9 +61139,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61152,9 +61152,11 @@
                     "portName": null,
                     "ifIndex": 811,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61244,9 +61246,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61259,9 +61259,11 @@
                     "portName": null,
                     "ifIndex": 814,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61351,9 +61353,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61366,9 +61366,11 @@
                     "portName": null,
                     "ifIndex": 815,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61458,9 +61460,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61473,9 +61473,11 @@
                     "portName": null,
                     "ifIndex": 818,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61565,9 +61567,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61580,9 +61580,11 @@
                     "portName": null,
                     "ifIndex": 834,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61672,9 +61674,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61687,9 +61687,11 @@
                     "portName": null,
                     "ifIndex": 835,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61779,9 +61781,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61794,9 +61794,11 @@
                     "portName": null,
                     "ifIndex": 836,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61886,9 +61888,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -61901,9 +61901,11 @@
                     "portName": null,
                     "ifIndex": 838,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -61993,9 +61995,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62008,9 +62008,11 @@
                     "portName": null,
                     "ifIndex": 848,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62100,9 +62102,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62115,9 +62115,11 @@
                     "portName": null,
                     "ifIndex": 849,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62207,9 +62209,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62222,9 +62222,11 @@
                     "portName": null,
                     "ifIndex": 850,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62314,9 +62316,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62329,9 +62329,11 @@
                     "portName": null,
                     "ifIndex": 854,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62421,9 +62423,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62436,9 +62436,11 @@
                     "portName": null,
                     "ifIndex": 871,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62528,9 +62530,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62543,9 +62543,11 @@
                     "portName": null,
                     "ifIndex": 872,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62635,9 +62637,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62650,9 +62650,11 @@
                     "portName": null,
                     "ifIndex": 874,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62742,9 +62744,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62757,9 +62757,11 @@
                     "portName": null,
                     "ifIndex": 875,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62849,9 +62851,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62864,9 +62864,11 @@
                     "portName": null,
                     "ifIndex": 876,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -62956,9 +62958,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -62971,9 +62971,11 @@
                     "portName": null,
                     "ifIndex": 877,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63063,9 +63065,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63078,9 +63078,11 @@
                     "portName": null,
                     "ifIndex": 883,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63170,9 +63172,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63185,9 +63185,11 @@
                     "portName": null,
                     "ifIndex": 885,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63277,9 +63279,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63292,9 +63292,11 @@
                     "portName": null,
                     "ifIndex": 907,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63384,9 +63386,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63399,9 +63399,11 @@
                     "portName": null,
                     "ifIndex": 908,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63491,9 +63493,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63506,9 +63506,11 @@
                     "portName": null,
                     "ifIndex": 909,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63598,9 +63600,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63613,9 +63613,11 @@
                     "portName": null,
                     "ifIndex": 919,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63705,9 +63707,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63720,9 +63720,11 @@
                     "portName": null,
                     "ifIndex": 920,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63812,9 +63814,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63827,9 +63827,11 @@
                     "portName": null,
                     "ifIndex": 921,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -63919,9 +63921,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -63934,9 +63934,11 @@
                     "portName": null,
                     "ifIndex": 925,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64026,9 +64028,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64041,9 +64041,11 @@
                     "portName": null,
                     "ifIndex": 926,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64133,9 +64135,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64148,9 +64148,11 @@
                     "portName": null,
                     "ifIndex": 927,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64240,9 +64242,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64255,9 +64255,11 @@
                     "portName": null,
                     "ifIndex": 938,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64347,9 +64349,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64362,9 +64362,11 @@
                     "portName": null,
                     "ifIndex": 939,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64454,9 +64456,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64469,9 +64469,11 @@
                     "portName": null,
                     "ifIndex": 940,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64561,9 +64563,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64576,9 +64576,11 @@
                     "portName": null,
                     "ifIndex": 941,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64668,9 +64670,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64683,9 +64683,11 @@
                     "portName": null,
                     "ifIndex": 947,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64775,9 +64777,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -64790,9 +64790,11 @@
                     "portName": null,
                     "ifIndex": 948,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -64882,9 +64884,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ios_nac.json b/tests/data/ios_nac.json
index 684d371ed3..2d6b5fb612 100644
--- a/tests/data/ios_nac.json
+++ b/tests/data/ios_nac.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -120,9 +120,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -212,9 +214,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -227,9 +227,11 @@
                     "portName": null,
                     "ifIndex": 10001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -319,9 +321,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -334,9 +334,11 @@
                     "portName": null,
                     "ifIndex": 10002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -426,9 +428,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -441,9 +441,11 @@
                     "portName": null,
                     "ifIndex": 10003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -533,9 +535,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -548,9 +548,11 @@
                     "portName": null,
                     "ifIndex": 10004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -640,9 +642,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -655,9 +655,11 @@
                     "portName": null,
                     "ifIndex": 10005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -747,9 +749,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -762,9 +762,11 @@
                     "portName": null,
                     "ifIndex": 10006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -854,9 +856,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -869,9 +869,11 @@
                     "portName": null,
                     "ifIndex": 10007,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -961,9 +963,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -976,9 +976,11 @@
                     "portName": null,
                     "ifIndex": 10008,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1068,9 +1070,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1083,9 +1083,11 @@
                     "portName": null,
                     "ifIndex": 10101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1175,9 +1177,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1190,9 +1190,11 @@
                     "portName": null,
                     "ifIndex": 10501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1282,9 +1284,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1301,9 +1301,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1393,9 +1395,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1408,9 +1408,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1500,9 +1502,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1515,9 +1515,11 @@
                     "portName": null,
                     "ifIndex": 10001,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1607,9 +1609,7 @@
                     "ifOutMulticastPkts": 158,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1622,9 +1622,11 @@
                     "portName": null,
                     "ifIndex": 10002,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1714,9 +1716,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1729,9 +1729,11 @@
                     "portName": null,
                     "ifIndex": 10003,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1821,9 +1823,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1836,9 +1836,11 @@
                     "portName": null,
                     "ifIndex": 10004,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1928,9 +1930,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1943,9 +1943,11 @@
                     "portName": null,
                     "ifIndex": 10005,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2035,9 +2037,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2050,9 +2050,11 @@
                     "portName": null,
                     "ifIndex": 10006,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2142,9 +2144,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2157,9 +2157,11 @@
                     "portName": null,
                     "ifIndex": 10007,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2249,9 +2251,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2264,9 +2264,11 @@
                     "portName": null,
                     "ifIndex": 10008,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2356,9 +2358,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2371,9 +2371,11 @@
                     "portName": null,
                     "ifIndex": 10101,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2463,9 +2465,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2478,9 +2478,11 @@
                     "portName": null,
                     "ifIndex": 10501,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2570,9 +2572,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/iosxe_c9300.json b/tests/data/iosxe_c9300.json
index 6698a6b0df..5747184172 100644
--- a/tests/data/iosxe_c9300.json
+++ b/tests/data/iosxe_c9300.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 480000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 480000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 240000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 240000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 240000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 240000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": 480000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 480000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": 240000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 240000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": 240000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 240000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/iosxr.json b/tests/data/iosxr.json
index 54f38fc5a4..62c1c46d10 100644
--- a/tests/data/iosxr.json
+++ b/tests/data/iosxr.json
@@ -3214,9 +3214,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3306,9 +3308,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3321,9 +3321,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3413,9 +3415,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3428,9 +3428,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3520,9 +3522,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3535,9 +3535,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3627,9 +3629,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3642,9 +3642,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3734,9 +3736,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3749,9 +3749,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3841,9 +3843,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3856,9 +3856,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3948,9 +3950,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3963,9 +3963,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4055,9 +4057,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4070,9 +4070,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4162,9 +4164,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4177,9 +4177,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4269,9 +4271,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4284,9 +4284,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4376,9 +4378,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4391,9 +4391,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4483,9 +4485,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4498,9 +4498,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4590,9 +4592,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4605,9 +4605,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4697,9 +4699,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4712,9 +4712,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4804,9 +4806,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4819,9 +4819,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4911,9 +4913,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4926,9 +4926,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5018,9 +5020,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5033,9 +5033,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5125,9 +5127,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5140,9 +5140,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5232,9 +5234,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5247,9 +5247,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5339,9 +5341,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5354,9 +5354,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5446,9 +5448,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5461,9 +5461,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5553,9 +5555,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5568,9 +5568,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5660,9 +5662,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5675,9 +5675,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5767,9 +5769,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5782,9 +5782,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5874,9 +5876,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5889,9 +5889,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5981,9 +5983,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5996,9 +5996,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6088,9 +6090,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6103,9 +6103,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6195,9 +6197,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6210,9 +6210,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6302,9 +6304,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6317,9 +6317,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6409,9 +6411,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6424,9 +6424,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6516,9 +6518,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6531,9 +6531,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6623,9 +6625,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6638,9 +6638,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6730,9 +6732,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6745,9 +6745,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6837,9 +6839,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -6852,9 +6852,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6944,9 +6946,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6959,9 +6959,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7051,9 +7053,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7066,9 +7066,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7158,9 +7160,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7173,9 +7173,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -7265,9 +7267,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7280,9 +7280,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7372,9 +7374,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7387,9 +7387,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7479,9 +7481,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7494,9 +7494,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7586,9 +7588,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7601,9 +7601,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7693,9 +7695,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7708,9 +7708,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7800,9 +7802,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7815,9 +7815,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7907,9 +7909,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7922,9 +7922,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8014,9 +8016,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8029,9 +8029,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8121,9 +8123,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8136,9 +8136,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8228,9 +8230,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8243,9 +8243,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8335,9 +8337,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8350,9 +8350,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8442,9 +8444,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8457,9 +8457,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8549,9 +8551,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8564,9 +8564,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8656,9 +8658,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8671,9 +8671,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8763,9 +8765,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8778,9 +8778,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8870,9 +8872,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8885,9 +8885,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8977,9 +8979,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8992,9 +8992,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9084,9 +9086,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9099,9 +9099,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9191,9 +9193,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9206,9 +9206,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9298,9 +9300,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9313,9 +9313,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9405,9 +9407,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9420,9 +9420,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9512,9 +9514,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9527,9 +9527,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9619,9 +9621,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9634,9 +9634,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9726,9 +9728,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9741,9 +9741,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9833,9 +9835,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9848,9 +9848,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9940,9 +9942,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9955,9 +9955,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10047,9 +10049,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10062,9 +10062,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10154,9 +10156,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10169,9 +10169,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10261,9 +10263,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10276,9 +10276,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10368,9 +10370,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -10387,9 +10387,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10479,9 +10481,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10494,9 +10494,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10586,9 +10588,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10601,9 +10601,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10693,9 +10695,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10708,9 +10708,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10800,9 +10802,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10815,9 +10815,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10907,9 +10909,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10922,9 +10922,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11014,9 +11016,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11029,9 +11029,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11121,9 +11123,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11136,9 +11136,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11228,9 +11230,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11243,9 +11243,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11335,9 +11337,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11350,9 +11350,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11442,9 +11444,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11457,9 +11457,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11549,9 +11551,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11564,9 +11564,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11656,9 +11658,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11671,9 +11671,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11763,9 +11765,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11778,9 +11778,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11870,9 +11872,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11885,9 +11885,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11977,9 +11979,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11992,9 +11992,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12084,9 +12086,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12099,9 +12099,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12191,9 +12193,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12206,9 +12206,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12298,9 +12300,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12313,9 +12313,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12405,9 +12407,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12420,9 +12420,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12512,9 +12514,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12527,9 +12527,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12619,9 +12621,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12634,9 +12634,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12726,9 +12728,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12741,9 +12741,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12833,9 +12835,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12848,9 +12848,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12940,9 +12942,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12955,9 +12955,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13047,9 +13049,7 @@
                     "ifOutMulticastPkts": 14949,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13062,9 +13062,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13154,9 +13156,7 @@
                     "ifOutMulticastPkts": 30803,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13169,9 +13169,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13261,9 +13263,7 @@
                     "ifOutMulticastPkts": 14950,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13276,9 +13276,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13368,9 +13370,7 @@
                     "ifOutMulticastPkts": 14950,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13383,9 +13383,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13475,9 +13477,7 @@
                     "ifOutMulticastPkts": 17506,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13490,9 +13490,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13582,9 +13584,7 @@
                     "ifOutMulticastPkts": 14946,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13597,9 +13597,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13689,9 +13691,7 @@
                     "ifOutMulticastPkts": 14947,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13704,9 +13704,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13796,9 +13798,7 @@
                     "ifOutMulticastPkts": 14947,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13811,9 +13811,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13903,9 +13905,7 @@
                     "ifOutMulticastPkts": 8,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13918,9 +13918,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14010,9 +14012,7 @@
                     "ifOutMulticastPkts": 4386,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14025,9 +14025,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14117,9 +14119,7 @@
                     "ifOutMulticastPkts": 8,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14132,9 +14132,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14224,9 +14226,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14239,9 +14239,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14331,9 +14333,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14346,9 +14346,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14438,9 +14440,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14453,9 +14453,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14545,9 +14547,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14560,9 +14560,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14652,9 +14654,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14667,9 +14667,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14759,9 +14761,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14774,9 +14774,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14866,9 +14868,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14881,9 +14881,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14973,9 +14975,7 @@
                     "ifOutMulticastPkts": 17496,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14988,9 +14988,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15080,9 +15082,7 @@
                     "ifOutMulticastPkts": 14945,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15095,9 +15095,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15187,9 +15189,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15202,9 +15202,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15294,9 +15296,7 @@
                     "ifOutMulticastPkts": 75652,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15309,9 +15309,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15401,9 +15403,7 @@
                     "ifOutMulticastPkts": 62346,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15416,9 +15416,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15508,9 +15510,7 @@
                     "ifOutMulticastPkts": 2554,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15523,9 +15523,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15615,9 +15617,7 @@
                     "ifOutMulticastPkts": 2545,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15630,9 +15630,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15722,9 +15724,7 @@
                     "ifOutMulticastPkts": 11,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15737,9 +15737,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15829,9 +15831,7 @@
                     "ifOutMulticastPkts": 4889,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15844,9 +15844,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15936,9 +15938,7 @@
                     "ifOutMulticastPkts": 2799,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15951,9 +15951,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16043,9 +16045,7 @@
                     "ifOutMulticastPkts": 7,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16058,9 +16058,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16150,9 +16152,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16165,9 +16165,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16257,9 +16259,7 @@
                     "ifOutMulticastPkts": 2803,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16272,9 +16272,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16364,9 +16366,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16379,9 +16379,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 50000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 50,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16471,9 +16473,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16486,9 +16486,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16578,9 +16580,7 @@
                     "ifOutMulticastPkts": 251,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16593,9 +16593,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16685,9 +16687,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16700,9 +16700,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16792,9 +16794,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16807,9 +16807,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16899,9 +16901,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16914,9 +16914,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17006,9 +17008,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17021,9 +17021,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17113,9 +17115,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17128,9 +17128,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17220,9 +17222,7 @@
                     "ifOutMulticastPkts": 2553,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17235,9 +17235,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17327,9 +17329,7 @@
                     "ifOutMulticastPkts": 32441,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17342,9 +17342,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17434,9 +17436,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17449,9 +17449,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17541,9 +17543,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ipoman.json b/tests/data/ipoman.json
index 34d754708f..f6aae496ea 100644
--- a/tests/data/ipoman.json
+++ b/tests/data/ipoman.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ironware.json b/tests/data/ironware.json
index 1ec6cceb2c..f916e91ee3 100644
--- a/tests/data/ironware.json
+++ b/tests/data/ironware.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -8168,9 +8170,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -8275,9 +8277,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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+                    "ifHighSpeed_prev": null,
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@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -8917,9 +8919,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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@@ -9345,9 +9347,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 290,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 297,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 298,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 299,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 16777271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 16777282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 33554433,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 83886081,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 2812376,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 10621613,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 84979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 290,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 297,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 298,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 299,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 16777271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 16777282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 33554433,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 83886081,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 10706592,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/istars.json b/tests/data/istars.json
index c0614ca62e..a6a7bb20f1 100644
--- a/tests/data/istars.json
+++ b/tests/data/istars.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/jetdirect.json b/tests/data/jetdirect.json
index afb3b594f7..d46a32098e 100644
--- a/tests/data/jetdirect.json
+++ b/tests/data/jetdirect.json
@@ -94,9 +94,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -186,9 +188,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -201,9 +201,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -293,9 +295,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -308,9 +308,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -400,9 +402,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -415,9 +415,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -507,9 +509,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -526,9 +526,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -618,9 +620,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -633,9 +633,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -725,9 +727,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -740,9 +740,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -832,9 +834,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -847,9 +847,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -939,9 +941,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/jetdirect_m252dw.json b/tests/data/jetdirect_m252dw.json
index 508d019e9a..9c36cc2499 100644
--- a/tests/data/jetdirect_m252dw.json
+++ b/tests/data/jetdirect_m252dw.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/jetdirect_m880.json b/tests/data/jetdirect_m880.json
index cd99cce68c..ced79c2bee 100644
--- a/tests/data/jetdirect_m880.json
+++ b/tests/data/jetdirect_m880.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/jetstream.json b/tests/data/jetstream.json
index 923768b218..e03a45db31 100644
--- a/tests/data/jetstream.json
+++ b/tests/data/jetstream.json
@@ -69,9 +69,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -161,9 +163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -176,9 +176,11 @@
                     "portName": null,
                     "ifIndex": 32769,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -268,9 +270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -283,9 +283,11 @@
                     "portName": null,
                     "ifIndex": 32770,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -375,9 +377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -390,9 +390,11 @@
                     "portName": null,
                     "ifIndex": 49153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -482,9 +484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -497,9 +497,11 @@
                     "portName": null,
                     "ifIndex": 49154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -589,9 +591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -604,9 +604,11 @@
                     "portName": null,
                     "ifIndex": 49155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -696,9 +698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -711,9 +711,11 @@
                     "portName": null,
                     "ifIndex": 49156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -803,9 +805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -818,9 +818,11 @@
                     "portName": null,
                     "ifIndex": 49157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -910,9 +912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -925,9 +925,11 @@
                     "portName": null,
                     "ifIndex": 49158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1017,9 +1019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1032,9 +1032,11 @@
                     "portName": null,
                     "ifIndex": 49159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1124,9 +1126,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1139,9 +1139,11 @@
                     "portName": null,
                     "ifIndex": 49160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1231,9 +1233,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1246,9 +1246,11 @@
                     "portName": null,
                     "ifIndex": 49161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1338,9 +1340,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1353,9 +1353,11 @@
                     "portName": null,
                     "ifIndex": 49162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1445,9 +1447,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1460,9 +1460,11 @@
                     "portName": null,
                     "ifIndex": 49163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1552,9 +1554,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1567,9 +1567,11 @@
                     "portName": null,
                     "ifIndex": 49164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1659,9 +1661,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1674,9 +1674,11 @@
                     "portName": null,
                     "ifIndex": 49165,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1766,9 +1768,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1781,9 +1781,11 @@
                     "portName": null,
                     "ifIndex": 49166,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1873,9 +1875,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1888,9 +1888,11 @@
                     "portName": null,
                     "ifIndex": 49167,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1980,9 +1982,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1995,9 +1995,11 @@
                     "portName": null,
                     "ifIndex": 49168,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2087,9 +2089,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2102,9 +2102,11 @@
                     "portName": null,
                     "ifIndex": 49169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2194,9 +2196,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2209,9 +2209,11 @@
                     "portName": null,
                     "ifIndex": 49170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2301,9 +2303,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2316,9 +2316,11 @@
                     "portName": null,
                     "ifIndex": 49171,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2408,9 +2410,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2423,9 +2423,11 @@
                     "portName": null,
                     "ifIndex": 49172,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2515,9 +2517,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2530,9 +2530,11 @@
                     "portName": null,
                     "ifIndex": 49173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2622,9 +2624,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2637,9 +2637,11 @@
                     "portName": null,
                     "ifIndex": 49174,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2729,9 +2731,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2744,9 +2744,11 @@
                     "portName": null,
                     "ifIndex": 49175,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2836,9 +2838,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2851,9 +2851,11 @@
                     "portName": null,
                     "ifIndex": 49176,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2943,9 +2945,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2958,9 +2958,11 @@
                     "portName": null,
                     "ifIndex": 49177,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3050,9 +3052,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3065,9 +3065,11 @@
                     "portName": null,
                     "ifIndex": 49178,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3157,9 +3159,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3172,9 +3172,11 @@
                     "portName": null,
                     "ifIndex": 49179,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3264,9 +3266,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3279,9 +3279,11 @@
                     "portName": null,
                     "ifIndex": 49180,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3371,9 +3373,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3386,9 +3386,11 @@
                     "portName": null,
                     "ifIndex": 49181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3478,9 +3480,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3493,9 +3493,11 @@
                     "portName": null,
                     "ifIndex": 49182,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3585,9 +3587,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3600,9 +3600,11 @@
                     "portName": null,
                     "ifIndex": 49183,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3692,9 +3694,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3707,9 +3707,11 @@
                     "portName": null,
                     "ifIndex": 49184,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3799,9 +3801,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3814,9 +3814,11 @@
                     "portName": null,
                     "ifIndex": 49185,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3906,9 +3908,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3921,9 +3921,11 @@
                     "portName": null,
                     "ifIndex": 49186,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4013,9 +4015,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4028,9 +4028,11 @@
                     "portName": null,
                     "ifIndex": 49187,
                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4120,9 +4122,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4135,9 +4135,11 @@
                     "portName": null,
                     "ifIndex": 49188,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4227,9 +4229,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4242,9 +4242,11 @@
                     "portName": null,
                     "ifIndex": 49189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4334,9 +4336,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4349,9 +4349,11 @@
                     "portName": null,
                     "ifIndex": 49190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4441,9 +4443,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4456,9 +4456,11 @@
                     "portName": null,
                     "ifIndex": 49191,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4548,9 +4550,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4563,9 +4563,11 @@
                     "portName": null,
                     "ifIndex": 49192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4655,9 +4657,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4670,9 +4670,11 @@
                     "portName": null,
                     "ifIndex": 49193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4762,9 +4764,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4777,9 +4777,11 @@
                     "portName": null,
                     "ifIndex": 49194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4869,9 +4871,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4884,9 +4884,11 @@
                     "portName": null,
                     "ifIndex": 49195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4976,9 +4978,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4991,9 +4991,11 @@
                     "portName": null,
                     "ifIndex": 49196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5083,9 +5085,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5098,9 +5098,11 @@
                     "portName": null,
                     "ifIndex": 49197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5190,9 +5192,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5205,9 +5205,11 @@
                     "portName": null,
                     "ifIndex": 49198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5297,9 +5299,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5312,9 +5312,11 @@
                     "portName": null,
                     "ifIndex": 49199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5404,9 +5406,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5419,9 +5419,11 @@
                     "portName": null,
                     "ifIndex": 49200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5511,9 +5513,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5526,9 +5526,11 @@
                     "portName": null,
                     "ifIndex": 49201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5618,9 +5620,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5633,9 +5633,11 @@
                     "portName": null,
                     "ifIndex": 49202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5725,9 +5727,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5740,9 +5740,11 @@
                     "portName": null,
                     "ifIndex": 49203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5832,9 +5834,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5847,9 +5847,11 @@
                     "portName": null,
                     "ifIndex": 49204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5939,9 +5941,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5958,9 +5958,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6050,9 +6052,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6065,9 +6065,11 @@
                     "portName": null,
                     "ifIndex": 32769,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6157,9 +6159,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6172,9 +6172,11 @@
                     "portName": null,
                     "ifIndex": 32770,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6264,9 +6266,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/1 ",
@@ -6279,9 +6279,11 @@
                     "portName": null,
                     "ifIndex": 49153,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6371,9 +6373,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/2 ",
@@ -6386,9 +6386,11 @@
                     "portName": null,
                     "ifIndex": 49154,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6478,9 +6480,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/3 ",
@@ -6493,9 +6493,11 @@
                     "portName": null,
                     "ifIndex": 49155,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6585,9 +6587,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/4 ",
@@ -6600,9 +6600,11 @@
                     "portName": null,
                     "ifIndex": 49156,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6692,9 +6694,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/5 ",
@@ -6707,9 +6707,11 @@
                     "portName": null,
                     "ifIndex": 49157,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6799,9 +6801,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/6 ",
@@ -6814,9 +6814,11 @@
                     "portName": null,
                     "ifIndex": 49158,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6906,9 +6908,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/7 ",
@@ -6921,9 +6921,11 @@
                     "portName": null,
                     "ifIndex": 49159,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7013,9 +7015,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/8 ",
@@ -7028,9 +7028,11 @@
                     "portName": null,
                     "ifIndex": 49160,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7120,9 +7122,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/9 ",
@@ -7135,9 +7135,11 @@
                     "portName": null,
                     "ifIndex": 49161,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7227,9 +7229,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/10 ",
@@ -7242,9 +7242,11 @@
                     "portName": null,
                     "ifIndex": 49162,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7334,9 +7336,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/11 ",
@@ -7349,9 +7349,11 @@
                     "portName": null,
                     "ifIndex": 49163,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7441,9 +7443,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/12 ",
@@ -7456,9 +7456,11 @@
                     "portName": null,
                     "ifIndex": 49164,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7548,9 +7550,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/13 ",
@@ -7563,9 +7563,11 @@
                     "portName": null,
                     "ifIndex": 49165,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7655,9 +7657,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/14 ",
@@ -7670,9 +7670,11 @@
                     "portName": null,
                     "ifIndex": 49166,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7762,9 +7764,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/15 ",
@@ -7777,9 +7777,11 @@
                     "portName": null,
                     "ifIndex": 49167,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7869,9 +7871,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/16 ",
@@ -7884,9 +7884,11 @@
                     "portName": null,
                     "ifIndex": 49168,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7976,9 +7978,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/17 ",
@@ -7991,9 +7991,11 @@
                     "portName": null,
                     "ifIndex": 49169,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8083,9 +8085,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/18 ",
@@ -8098,9 +8098,11 @@
                     "portName": null,
                     "ifIndex": 49170,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8190,9 +8192,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/19 ",
@@ -8205,9 +8205,11 @@
                     "portName": null,
                     "ifIndex": 49171,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8297,9 +8299,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/20 ",
@@ -8312,9 +8312,11 @@
                     "portName": null,
                     "ifIndex": 49172,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8404,9 +8406,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/21 ",
@@ -8419,9 +8419,11 @@
                     "portName": null,
                     "ifIndex": 49173,
                     "ifSpeed": 0,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8511,9 +8513,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/22 ",
@@ -8526,9 +8526,11 @@
                     "portName": null,
                     "ifIndex": 49174,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8618,9 +8620,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/23 ",
@@ -8633,9 +8633,11 @@
                     "portName": null,
                     "ifIndex": 49175,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8725,9 +8727,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/24 ",
@@ -8740,9 +8740,11 @@
                     "portName": null,
                     "ifIndex": 49176,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8832,9 +8834,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/25 ",
@@ -8847,9 +8847,11 @@
                     "portName": null,
                     "ifIndex": 49177,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8939,9 +8941,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/26 ",
@@ -8954,9 +8954,11 @@
                     "portName": null,
                     "ifIndex": 49178,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9046,9 +9048,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/27 ",
@@ -9061,9 +9061,11 @@
                     "portName": null,
                     "ifIndex": 49179,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9153,9 +9155,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/28 ",
@@ -9168,9 +9168,11 @@
                     "portName": null,
                     "ifIndex": 49180,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9260,9 +9262,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/29 ",
@@ -9275,9 +9275,11 @@
                     "portName": null,
                     "ifIndex": 49181,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9367,9 +9369,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/30 ",
@@ -9382,9 +9382,11 @@
                     "portName": null,
                     "ifIndex": 49182,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9474,9 +9476,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/31 ",
@@ -9489,9 +9489,11 @@
                     "portName": null,
                     "ifIndex": 49183,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9581,9 +9583,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/32 ",
@@ -9596,9 +9596,11 @@
                     "portName": null,
                     "ifIndex": 49184,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9688,9 +9690,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/33 ",
@@ -9703,9 +9703,11 @@
                     "portName": null,
                     "ifIndex": 49185,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9795,9 +9797,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/34 ",
@@ -9810,9 +9810,11 @@
                     "portName": null,
                     "ifIndex": 49186,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9902,9 +9904,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/35 ",
@@ -9917,9 +9917,11 @@
                     "portName": null,
                     "ifIndex": 49187,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10009,9 +10011,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/36 ",
@@ -10024,9 +10024,11 @@
                     "portName": null,
                     "ifIndex": 49188,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10116,9 +10118,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/37 ",
@@ -10131,9 +10131,11 @@
                     "portName": null,
                     "ifIndex": 49189,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10223,9 +10225,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/38 ",
@@ -10238,9 +10238,11 @@
                     "portName": null,
                     "ifIndex": 49190,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10330,9 +10332,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/39 ",
@@ -10345,9 +10345,11 @@
                     "portName": null,
                     "ifIndex": 49191,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10437,9 +10439,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/40 ",
@@ -10452,9 +10452,11 @@
                     "portName": null,
                     "ifIndex": 49192,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10544,9 +10546,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/41 ",
@@ -10559,9 +10559,11 @@
                     "portName": null,
                     "ifIndex": 49193,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10651,9 +10653,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/42 ",
@@ -10666,9 +10666,11 @@
                     "portName": null,
                     "ifIndex": 49194,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10758,9 +10760,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/43 ",
@@ -10773,9 +10773,11 @@
                     "portName": null,
                     "ifIndex": 49195,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10865,9 +10867,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/44 ",
@@ -10880,9 +10880,11 @@
                     "portName": null,
                     "ifIndex": 49196,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10972,9 +10974,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/45 ",
@@ -10987,9 +10987,11 @@
                     "portName": null,
                     "ifIndex": 49197,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11079,9 +11081,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/46 ",
@@ -11094,9 +11094,11 @@
                     "portName": null,
                     "ifIndex": 49198,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11186,9 +11188,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/47 ",
@@ -11201,9 +11201,11 @@
                     "portName": null,
                     "ifIndex": 49199,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11293,9 +11295,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/48 ",
@@ -11308,9 +11308,11 @@
                     "portName": null,
                     "ifIndex": 49200,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11400,9 +11402,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/49 ",
@@ -11415,9 +11415,11 @@
                     "portName": null,
                     "ifIndex": 49201,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11507,9 +11509,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/50 ",
@@ -11522,9 +11522,11 @@
                     "portName": null,
                     "ifIndex": 49202,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11614,9 +11616,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/51 ",
@@ -11629,9 +11629,11 @@
                     "portName": null,
                     "ifIndex": 49203,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11721,9 +11723,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "gigabitethernet 1/0/52 ",
@@ -11736,9 +11736,11 @@
                     "portName": null,
                     "ifIndex": 49204,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11828,9 +11830,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/junos.json b/tests/data/junos.json
index 67ffcca58c..190dfe340b 100644
--- a/tests/data/junos.json
+++ b/tests/data/junos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 502,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 517,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 521,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 523,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 525,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 526,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 527,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 530,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 531,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 534,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 537,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 538,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 539,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 540,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 541,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 542,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 543,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 545,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 546,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 547,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 548,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 549,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 550,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 551,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 552,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 553,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 554,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 555,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 556,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 557,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 558,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 559,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 561,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 562,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 563,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 564,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 565,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 566,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 567,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 569,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 570,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 571,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 572,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 573,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 574,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 575,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 576,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 577,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 578,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 579,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 580,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 581,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 582,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 583,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -11271,9 +11273,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 584,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 585,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 586,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 587,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 588,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 589,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 591,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 592,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 593,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 594,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 595,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 596,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 597,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 598,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 599,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 602,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 603,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 604,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 605,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 606,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 607,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 608,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 609,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 610,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 636,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 637,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 638,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 640,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 641,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 642,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 643,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 644,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 645,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 502,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 517,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 521,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 523,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 525,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 526,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 527,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 530,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 531,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 534,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 537,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 538,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 539,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 540,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 541,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 542,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 543,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 545,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 546,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 547,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 548,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 549,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 550,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 551,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 552,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 553,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 554,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 555,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 556,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 557,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 558,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 559,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 561,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 562,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 563,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 564,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 565,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 566,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 567,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 569,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 570,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 571,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 572,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 573,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 574,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 575,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 576,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 577,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 578,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 579,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 580,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 581,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 582,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 583,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 584,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 585,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 586,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 587,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 588,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 589,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 591,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 592,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 593,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 594,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 595,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 596,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 597,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 598,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 599,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 602,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 603,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 604,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 605,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 606,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 607,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 608,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 609,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 610,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 636,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 637,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 638,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 640,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 641,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 642,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 643,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 644,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 645,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 10000050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 10000053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 10001050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 10001053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 10002048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 10002053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 10003048,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 10003053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/junos_qfx5100.json b/tests/data/junos_qfx5100.json
index 5e16023217..cde2c07f6e 100644
--- a/tests/data/junos_qfx5100.json
+++ b/tests/data/junos_qfx5100.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 502,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 517,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 523,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 525,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 526,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 527,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 530,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 531,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 502,
                     "ifSpeed": 800000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 800,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 505,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 9774805,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 513,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 12459369,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 517,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 2684286,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 206,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 522,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 2145745,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 523,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 509,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 525,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 526,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 2218205,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 527,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 529,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 76522,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 530,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 19549588,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 531,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 533,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/junos_srx3600.json b/tests/data/junos_srx3600.json
index eae1c0174f..63073e7cbe 100644
--- a/tests/data/junos_srx3600.json
+++ b/tests/data/junos_srx3600.json
@@ -394,9 +394,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -486,9 +488,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -501,9 +501,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -593,9 +595,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -608,9 +608,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -700,9 +702,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -715,9 +715,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -807,9 +809,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -822,9 +822,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -914,9 +916,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -929,9 +929,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1021,9 +1023,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1036,9 +1036,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1128,9 +1130,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1143,9 +1143,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1235,9 +1237,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1250,9 +1250,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1342,9 +1344,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1357,9 +1357,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1449,9 +1451,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1464,9 +1464,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1556,9 +1558,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1571,9 +1571,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1663,9 +1665,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1678,9 +1678,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1770,9 +1772,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1785,9 +1785,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1877,9 +1879,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1892,9 +1892,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1984,9 +1986,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1999,9 +1999,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2091,9 +2093,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2106,9 +2106,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2198,9 +2200,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2213,9 +2213,11 @@
                     "portName": null,
                     "ifIndex": 501,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2305,9 +2307,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2320,9 +2320,11 @@
                     "portName": null,
                     "ifIndex": 502,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2412,9 +2414,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2427,9 +2427,11 @@
                     "portName": null,
                     "ifIndex": 503,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2519,9 +2521,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2534,9 +2534,11 @@
                     "portName": null,
                     "ifIndex": 504,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2626,9 +2628,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2641,9 +2641,11 @@
                     "portName": null,
                     "ifIndex": 505,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2733,9 +2735,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2748,9 +2748,11 @@
                     "portName": null,
                     "ifIndex": 506,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2840,9 +2842,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2855,9 +2855,11 @@
                     "portName": null,
                     "ifIndex": 507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2947,9 +2949,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2962,9 +2962,11 @@
                     "portName": null,
                     "ifIndex": 508,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3054,9 +3056,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3069,9 +3069,11 @@
                     "portName": null,
                     "ifIndex": 509,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3161,9 +3163,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3176,9 +3176,11 @@
                     "portName": null,
                     "ifIndex": 510,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3268,9 +3270,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3283,9 +3283,11 @@
                     "portName": null,
                     "ifIndex": 511,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3375,9 +3377,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3390,9 +3390,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3482,9 +3484,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3497,9 +3497,11 @@
                     "portName": null,
                     "ifIndex": 513,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3589,9 +3591,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3604,9 +3604,11 @@
                     "portName": null,
                     "ifIndex": 514,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3696,9 +3698,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3711,9 +3711,11 @@
                     "portName": null,
                     "ifIndex": 515,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3803,9 +3805,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3818,9 +3818,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3910,9 +3912,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3925,9 +3925,11 @@
                     "portName": null,
                     "ifIndex": 517,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4017,9 +4019,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4032,9 +4032,11 @@
                     "portName": null,
                     "ifIndex": 518,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4124,9 +4126,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4139,9 +4139,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4231,9 +4233,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4246,9 +4246,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4338,9 +4340,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4353,9 +4353,11 @@
                     "portName": null,
                     "ifIndex": 521,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4445,9 +4447,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4460,9 +4460,11 @@
                     "portName": null,
                     "ifIndex": 522,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4552,9 +4554,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4567,9 +4567,11 @@
                     "portName": null,
                     "ifIndex": 523,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4659,9 +4661,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4674,9 +4674,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4766,9 +4768,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4781,9 +4781,11 @@
                     "portName": null,
                     "ifIndex": 526,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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@@ -4873,9 +4875,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4888,9 +4888,11 @@
                     "portName": null,
                     "ifIndex": 527,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -4980,9 +4982,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -4995,9 +4995,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifAdminStatus": null,
@@ -5087,9 +5089,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5102,9 +5102,11 @@
                     "portName": null,
                     "ifIndex": 529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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@@ -5194,9 +5196,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5209,9 +5209,11 @@
                     "portName": null,
                     "ifIndex": 530,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -5301,9 +5303,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5316,9 +5316,11 @@
                     "portName": null,
                     "ifIndex": 531,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -5408,9 +5410,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5423,9 +5423,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -5515,9 +5517,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5530,9 +5530,11 @@
                     "portName": null,
                     "ifIndex": 533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -5622,9 +5624,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5637,9 +5637,11 @@
                     "portName": null,
                     "ifIndex": 534,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -5729,9 +5731,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5744,9 +5744,11 @@
                     "portName": null,
                     "ifIndex": 535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -5836,9 +5838,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5851,9 +5851,11 @@
                     "portName": null,
                     "ifIndex": 536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -5943,9 +5945,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5958,9 +5958,11 @@
                     "portName": null,
                     "ifIndex": 537,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -6050,9 +6052,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6065,9 +6065,11 @@
                     "portName": null,
                     "ifIndex": 538,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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@@ -6157,9 +6159,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6172,9 +6172,11 @@
                     "portName": null,
                     "ifIndex": 539,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -6264,9 +6266,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6279,9 +6279,11 @@
                     "portName": null,
                     "ifIndex": 540,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -6371,9 +6373,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6386,9 +6386,11 @@
                     "portName": null,
                     "ifIndex": 541,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -6478,9 +6480,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6493,9 +6493,11 @@
                     "portName": null,
                     "ifIndex": 542,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -6585,9 +6587,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6600,9 +6600,11 @@
                     "portName": null,
                     "ifIndex": 543,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -6692,9 +6694,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6707,9 +6707,11 @@
                     "portName": null,
                     "ifIndex": 544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6799,9 +6801,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6814,9 +6814,11 @@
                     "portName": null,
                     "ifIndex": 545,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6906,9 +6908,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6921,9 +6921,11 @@
                     "portName": null,
                     "ifIndex": 546,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7013,9 +7015,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7028,9 +7028,11 @@
                     "portName": null,
                     "ifIndex": 547,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7120,9 +7122,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7135,9 +7135,11 @@
                     "portName": null,
                     "ifIndex": 549,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7227,9 +7229,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7242,9 +7242,11 @@
                     "portName": null,
                     "ifIndex": 550,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7334,9 +7336,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7349,9 +7349,11 @@
                     "portName": null,
                     "ifIndex": 551,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7441,9 +7443,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7456,9 +7456,11 @@
                     "portName": null,
                     "ifIndex": 552,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7548,9 +7550,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7563,9 +7563,11 @@
                     "portName": null,
                     "ifIndex": 553,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7655,9 +7657,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7670,9 +7670,11 @@
                     "portName": null,
                     "ifIndex": 554,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": null,
@@ -7762,9 +7764,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7777,9 +7777,11 @@
                     "portName": null,
                     "ifIndex": 555,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7869,9 +7871,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7884,9 +7884,11 @@
                     "portName": null,
                     "ifIndex": 556,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7976,9 +7978,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7991,9 +7991,11 @@
                     "portName": null,
                     "ifIndex": 557,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8083,9 +8085,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8098,9 +8098,11 @@
                     "portName": null,
                     "ifIndex": 558,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8190,9 +8192,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8205,9 +8205,11 @@
                     "portName": null,
                     "ifIndex": 559,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8297,9 +8299,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8312,9 +8312,11 @@
                     "portName": null,
                     "ifIndex": 560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8404,9 +8406,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8419,9 +8419,11 @@
                     "portName": null,
                     "ifIndex": 561,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8511,9 +8513,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8526,9 +8526,11 @@
                     "portName": null,
                     "ifIndex": 562,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8618,9 +8620,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8633,9 +8633,11 @@
                     "portName": null,
                     "ifIndex": 563,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8725,9 +8727,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8740,9 +8740,11 @@
                     "portName": null,
                     "ifIndex": 564,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8832,9 +8834,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8847,9 +8847,11 @@
                     "portName": null,
                     "ifIndex": 565,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8939,9 +8941,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8954,9 +8954,11 @@
                     "portName": null,
                     "ifIndex": 566,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9046,9 +9048,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9061,9 +9061,11 @@
                     "portName": null,
                     "ifIndex": 567,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9153,9 +9155,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9168,9 +9168,11 @@
                     "portName": null,
                     "ifIndex": 568,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9260,9 +9262,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9275,9 +9275,11 @@
                     "portName": null,
                     "ifIndex": 569,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9367,9 +9369,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9382,9 +9382,11 @@
                     "portName": null,
                     "ifIndex": 570,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9474,9 +9476,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9489,9 +9489,11 @@
                     "portName": null,
                     "ifIndex": 571,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9581,9 +9583,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
diff --git a/tests/data/konica.json b/tests/data/konica.json
index ac1b6e0416..924340fc2c 100644
--- a/tests/data/konica.json
+++ b/tests/data/konica.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/konica_2.json b/tests/data/konica_2.json
index aaa7a018a4..b33d3f11eb 100644
--- a/tests/data/konica_2.json
+++ b/tests/data/konica_2.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/lcos_oap-321.json b/tests/data/lcos_oap-321.json
index fa335b8d7a..9e85fb28ab 100644
--- a/tests/data/lcos_oap-321.json
+++ b/tests/data/lcos_oap-321.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 100019,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 8215996,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16747,9 +16747,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16839,9 +16841,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16854,9 +16854,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16946,9 +16948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16961,9 +16961,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "lowerLayerDown",
                     "ifOperStatus_prev": "lowerLayerDown",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/linksys-ss_lgs318p.json b/tests/data/linksys-ss_lgs318p.json
index 7b5322c037..a576902535 100644
--- a/tests/data/linksys-ss_lgs318p.json
+++ b/tests/data/linksys-ss_lgs318p.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 100004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 100010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 100019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 300000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 34387990,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 4038111,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 5164977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 967702,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 29185777,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 104708,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 23890551,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 14144182,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 60397,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 34688312,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 333555,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 28977454,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 30388016,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 29284789,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 2832214,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 35369894,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 7000,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 100004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 100010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 100019,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 300000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/linux_asterisk-v1.json b/tests/data/linux_asterisk-v1.json
index c34709a158..bf229ad0fa 100644
--- a/tests/data/linux_asterisk-v1.json
+++ b/tests/data/linux_asterisk-v1.json
@@ -93,5 +93,43 @@
                 }
             ]
         }
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "<private>",
+                    "sysObjectID": ".1.3.6.1.4.1.8072.3.2.10",
+                    "sysDescr": "Linux joseph.tingiris 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58 UTC 2018 x86_64",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "linux",
+                    "type": "server",
+                    "serial": null,
+                    "icon": "linux.svg",
+                    "location": null
+                }
+            ]
+        },
+        "poller": {
+            "devices": [
+                {
+                    "sysName": "<private>",
+                    "sysObjectID": ".1.3.6.1.4.1.8072.3.2.10",
+                    "sysDescr": "Linux joseph.tingiris 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58 UTC 2018 x86_64",
+                    "sysContact": "<private>",
+                    "version": "3.10.0-693.17.1.el7.x86_64",
+                    "hardware": "Generic x86 64-bit",
+                    "features": null,
+                    "os": "linux",
+                    "type": "server",
+                    "serial": null,
+                    "icon": "linux.svg",
+                    "location": "<private>"
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/linux_mailcow-dockerized-v1.json b/tests/data/linux_mailcow-dockerized-v1.json
index aabf1b753b..d113625dce 100644
--- a/tests/data/linux_mailcow-dockerized-v1.json
+++ b/tests/data/linux_mailcow-dockerized-v1.json
@@ -117,5 +117,43 @@
                 }
             ]
         }
+    },
+    "os": {
+        "discovery": {
+            "devices": [
+                {
+                    "sysName": "<private>",
+                    "sysObjectID": ".1.3.6.1.4.1.8072.3.2.10",
+                    "sysDescr": "Linux mbx01 4.15.0-88-generic #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 x86_64",
+                    "sysContact": null,
+                    "version": null,
+                    "hardware": null,
+                    "features": null,
+                    "os": "linux",
+                    "type": "server",
+                    "serial": null,
+                    "icon": "linux.svg",
+                    "location": null
+                }
+            ]
+        },
+        "poller": {
+            "devices": [
+                {
+                    "sysName": "<private>",
+                    "sysObjectID": ".1.3.6.1.4.1.8072.3.2.10",
+                    "sysDescr": "Linux mbx01 4.15.0-88-generic #88-Ubuntu SMP Tue Feb 11 20:11:34 UTC 2020 x86_64",
+                    "sysContact": "<private>",
+                    "version": "4.15.0-88-generic",
+                    "hardware": "Generic x86 64-bit",
+                    "features": null,
+                    "os": "linux",
+                    "type": "server",
+                    "serial": null,
+                    "icon": "linux.svg",
+                    "location": "<private>"
+                }
+            ]
+        }
     }
 }
diff --git a/tests/data/linux_ntc.json b/tests/data/linux_ntc.json
index c99d45be34..ad34b7ad83 100644
--- a/tests/data/linux_ntc.json
+++ b/tests/data/linux_ntc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/linux_zfs-legacy.json b/tests/data/linux_zfs-legacy.json
index 172b0143cd..13dd9fd458 100644
--- a/tests/data/linux_zfs-legacy.json
+++ b/tests/data/linux_zfs-legacy.json
@@ -27,7 +27,7 @@
             "application_metrics": [
                 {
                     "metric": "actual_hit_per",
-                    "value": 91.2647166583064,
+                    "value": 91.264716658306,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -39,7 +39,7 @@
                 },
                 {
                     "metric": "anon_hits_per",
-                    "value": 0.874473636621974,
+                    "value": 0.87447363662197,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -69,31 +69,31 @@
                 },
                 {
                     "metric": "arc_size_per",
-                    "value": 14.8933449464274,
+                    "value": 14.893344946427,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "cache_hits_per",
-                    "value": 92.8365612334838,
+                    "value": 92.836561233484,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "cache_miss_per",
-                    "value": 7.16343876651615,
+                    "value": 7.1634387665162,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "data_demand_per",
-                    "value": 98.1858475805871,
+                    "value": 98.185847580587,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "data_pre_per",
-                    "value": 76.2434158392766,
+                    "value": 76.243415839277,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -123,7 +123,7 @@
                 },
                 {
                     "metric": "demand_hits_per",
-                    "value": 0.653102387153656,
+                    "value": 0.65310238715366,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -141,7 +141,7 @@
                 },
                 {
                     "metric": "demand_misses_per",
-                    "value": 0.156388078086924,
+                    "value": 0.15638807808692,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -153,19 +153,19 @@
                 },
                 {
                     "metric": "freq_used_per",
-                    "value": 30.4208192658705,
+                    "value": 30.42081926587,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "meta_hits_per",
-                    "value": 95.3338745627294,
+                    "value": 95.333874562729,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "meta_misses_per",
-                    "value": 93.7181879517695,
+                    "value": 93.718187951769,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -177,7 +177,7 @@
                 },
                 {
                     "metric": "mfu_ghost_per",
-                    "value": 0.520110805671704,
+                    "value": 0.5201108056717,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -189,7 +189,7 @@
                 },
                 {
                     "metric": "mfu_per",
-                    "value": 80.2313987496992,
+                    "value": 80.231398749699,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -213,7 +213,7 @@
                 },
                 {
                     "metric": "mru_ghost_per",
-                    "value": 0.298546533577213,
+                    "value": 0.29854653357721,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -225,7 +225,7 @@
                 },
                 {
                     "metric": "mru_per",
-                    "value": 18.0754702744299,
+                    "value": 18.07547027443,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -303,7 +303,7 @@
                 },
                 {
                     "metric": "pre_hits_per",
-                    "value": 0.0164865513576713,
+                    "value": 0.016486551357671,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -315,7 +315,7 @@
                 },
                 {
                     "metric": "pre_meta_hits_per",
-                    "value": 3.99653649875926,
+                    "value": 3.9965364987593,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -327,13 +327,13 @@
                 },
                 {
                     "metric": "pre_meta_misses_per",
-                    "value": 6.05884930927075,
+                    "value": 6.0588493092707,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "pre_misses_per",
-                    "value": 0.0665746608728707,
+                    "value": 0.066574660872871,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -345,7 +345,7 @@
                 },
                 {
                     "metric": "rec_used_per",
-                    "value": 69.5791807341295,
+                    "value": 69.579180734129,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -363,7 +363,7 @@
                 },
                 {
                     "metric": "target_size_arat",
-                    "value": 0.160478656612471,
+                    "value": 0.16047865661247,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -381,7 +381,7 @@
                 },
                 {
                     "metric": "target_size_per",
-                    "value": 16.0478656612471,
+                    "value": 16.047865661247,
                     "value_prev": null,
                     "app_type": "zfs"
                 }
diff --git a/tests/data/linux_zfs-v1.json b/tests/data/linux_zfs-v1.json
index 172b0143cd..13dd9fd458 100644
--- a/tests/data/linux_zfs-v1.json
+++ b/tests/data/linux_zfs-v1.json
@@ -27,7 +27,7 @@
             "application_metrics": [
                 {
                     "metric": "actual_hit_per",
-                    "value": 91.2647166583064,
+                    "value": 91.264716658306,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -39,7 +39,7 @@
                 },
                 {
                     "metric": "anon_hits_per",
-                    "value": 0.874473636621974,
+                    "value": 0.87447363662197,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -69,31 +69,31 @@
                 },
                 {
                     "metric": "arc_size_per",
-                    "value": 14.8933449464274,
+                    "value": 14.893344946427,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "cache_hits_per",
-                    "value": 92.8365612334838,
+                    "value": 92.836561233484,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "cache_miss_per",
-                    "value": 7.16343876651615,
+                    "value": 7.1634387665162,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "data_demand_per",
-                    "value": 98.1858475805871,
+                    "value": 98.185847580587,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "data_pre_per",
-                    "value": 76.2434158392766,
+                    "value": 76.243415839277,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -123,7 +123,7 @@
                 },
                 {
                     "metric": "demand_hits_per",
-                    "value": 0.653102387153656,
+                    "value": 0.65310238715366,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -141,7 +141,7 @@
                 },
                 {
                     "metric": "demand_misses_per",
-                    "value": 0.156388078086924,
+                    "value": 0.15638807808692,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -153,19 +153,19 @@
                 },
                 {
                     "metric": "freq_used_per",
-                    "value": 30.4208192658705,
+                    "value": 30.42081926587,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "meta_hits_per",
-                    "value": 95.3338745627294,
+                    "value": 95.333874562729,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "meta_misses_per",
-                    "value": 93.7181879517695,
+                    "value": 93.718187951769,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -177,7 +177,7 @@
                 },
                 {
                     "metric": "mfu_ghost_per",
-                    "value": 0.520110805671704,
+                    "value": 0.5201108056717,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -189,7 +189,7 @@
                 },
                 {
                     "metric": "mfu_per",
-                    "value": 80.2313987496992,
+                    "value": 80.231398749699,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -213,7 +213,7 @@
                 },
                 {
                     "metric": "mru_ghost_per",
-                    "value": 0.298546533577213,
+                    "value": 0.29854653357721,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -225,7 +225,7 @@
                 },
                 {
                     "metric": "mru_per",
-                    "value": 18.0754702744299,
+                    "value": 18.07547027443,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -303,7 +303,7 @@
                 },
                 {
                     "metric": "pre_hits_per",
-                    "value": 0.0164865513576713,
+                    "value": 0.016486551357671,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -315,7 +315,7 @@
                 },
                 {
                     "metric": "pre_meta_hits_per",
-                    "value": 3.99653649875926,
+                    "value": 3.9965364987593,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -327,13 +327,13 @@
                 },
                 {
                     "metric": "pre_meta_misses_per",
-                    "value": 6.05884930927075,
+                    "value": 6.0588493092707,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
                 {
                     "metric": "pre_misses_per",
-                    "value": 0.0665746608728707,
+                    "value": 0.066574660872871,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -345,7 +345,7 @@
                 },
                 {
                     "metric": "rec_used_per",
-                    "value": 69.5791807341295,
+                    "value": 69.579180734129,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -363,7 +363,7 @@
                 },
                 {
                     "metric": "target_size_arat",
-                    "value": 0.160478656612471,
+                    "value": 0.16047865661247,
                     "value_prev": null,
                     "app_type": "zfs"
                 },
@@ -381,7 +381,7 @@
                 },
                 {
                     "metric": "target_size_per",
-                    "value": 16.0478656612471,
+                    "value": 16.047865661247,
                     "value_prev": null,
                     "app_type": "zfs"
                 }
diff --git a/tests/data/luminato.json b/tests/data/luminato.json
index 2f4490ce0c..dd9fccde3c 100644
--- a/tests/data/luminato.json
+++ b/tests/data/luminato.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 3123306,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 77633254871,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/marathonups.json b/tests/data/marathonups.json
index 06d1c4bbe8..624528dc50 100644
--- a/tests/data/marathonups.json
+++ b/tests/data/marathonups.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/microsemipdsine.json b/tests/data/microsemipdsine.json
index 9f4f5f0e32..5dcb2f34e4 100644
--- a/tests/data/microsemipdsine.json
+++ b/tests/data/microsemipdsine.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/mimosa.json b/tests/data/mimosa.json
index 69e639eac6..bdee5c074e 100644
--- a/tests/data/mimosa.json
+++ b/tests/data/mimosa.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -124,9 +124,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -216,9 +218,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/mimosa_b5.json b/tests/data/mimosa_b5.json
index b0bbb61fb5..657460bd21 100644
--- a/tests/data/mimosa_b5.json
+++ b/tests/data/mimosa_b5.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/moxa-etherdevice_edsg512epoe.json b/tests/data/moxa-etherdevice_edsg512epoe.json
index 32a096dee4..04347567bc 100644
--- a/tests/data/moxa-etherdevice_edsg512epoe.json
+++ b/tests/data/moxa-etherdevice_edsg512epoe.json
@@ -434,9 +434,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -526,9 +528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -541,9 +541,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -633,9 +635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -648,9 +648,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -740,9 +742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -755,9 +755,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -847,9 +849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -862,9 +862,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -954,9 +956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -969,9 +969,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1061,9 +1063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1076,9 +1076,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1168,9 +1170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1183,9 +1183,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1275,9 +1277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1290,9 +1290,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1382,9 +1384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1397,9 +1397,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1489,9 +1491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1504,9 +1504,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1596,9 +1598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1611,9 +1611,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1703,9 +1705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1718,9 +1718,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1810,9 +1812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1825,9 +1825,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1917,9 +1919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
diff --git a/tests/data/moxa-etherdevice_edsp510a8poe.json b/tests/data/moxa-etherdevice_edsp510a8poe.json
index 58f12c33db..6779a4733f 100644
--- a/tests/data/moxa-etherdevice_edsp510a8poe.json
+++ b/tests/data/moxa-etherdevice_edsp510a8poe.json
@@ -410,9 +410,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -502,9 +504,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -517,9 +517,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -609,9 +611,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -624,9 +624,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -716,9 +718,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -731,9 +731,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -823,9 +825,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -838,9 +838,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -930,9 +932,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -945,9 +945,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1037,9 +1039,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1052,9 +1052,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1144,9 +1146,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1159,9 +1159,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1251,9 +1253,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1266,9 +1266,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1358,9 +1360,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1373,9 +1373,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1465,9 +1467,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1480,9 +1480,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1572,9 +1574,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1587,9 +1587,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1679,9 +1681,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
diff --git a/tests/data/mrv-od.json b/tests/data/mrv-od.json
index bafe44dfda..b4d6e15636 100644
--- a/tests/data/mrv-od.json
+++ b/tests/data/mrv-od.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 101001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 101002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 101003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 101004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 111001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 111002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 112001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 112002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 114001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 114002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 116001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 116002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 116003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 116004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 101001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 101002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 101003,
                     "ifSpeed": 10300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 101004,
                     "ifSpeed": 10300000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10300,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 111001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 111002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 112001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 112002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 114001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 114002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 116001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 116002,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 116003,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 116004,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 11339793,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/mypoweros.json b/tests/data/mypoweros.json
index f0ddeaf725..c13d003cea 100644
--- a/tests/data/mypoweros.json
+++ b/tests/data/mypoweros.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 9929084,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 11724688,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 11724712,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 11165885,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 1488581,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 11724683,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 11632708,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 11245564,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 6143564,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 10108816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 10220979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 1492537,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 9570439,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 2801551,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 11165538,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 147207,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 147202,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 71507,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 163420,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 163412,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 71505,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 7629566,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 2826907,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 7110720,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 30032392,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 12905664,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 38430854,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 63658767,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 13000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 13000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 13000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 13000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 13000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 13000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 54271314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 13000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 13000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 62682787,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 17389128,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": 2000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 2000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 51336518,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 17314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 3861,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/netagent2.json b/tests/data/netagent2.json
index f3ae2f5954..e6df67a8cf 100644
--- a/tests/data/netagent2.json
+++ b/tests/data/netagent2.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "0",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "0",
                     "ifOperStatus_prev": "0",
                     "ifAdminStatus": "0",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/netscaler.json b/tests/data/netscaler.json
index dafeeeff12..e514b00141 100644
--- a/tests/data/netscaler.json
+++ b/tests/data/netscaler.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 413,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 422,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 536,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 3193,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/nexans.json b/tests/data/nexans.json
index d941ece132..2d18d074ad 100644
--- a/tests/data/nexans.json
+++ b/tests/data/nexans.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 3,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 6,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 12,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 9,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 19500,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/nios.json b/tests/data/nios.json
index 4fc262cb92..99a7a5b7f7 100644
--- a/tests/data/nios.json
+++ b/tests/data/nios.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/nokia-isam.json b/tests/data/nokia-isam.json
index 6fc10d5a6e..ccf7b4ca19 100644
--- a/tests/data/nokia-isam.json
+++ b/tests/data/nokia-isam.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 20972544,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 100663360,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 100664384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 100665408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 127926272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 128057344,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 128188416,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 128319488,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 128450560,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 128581632,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 128712704,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 128843776,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 128974848,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 129105920,
                     "ifSpeed": null,
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@@ -1534,9 +1536,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -1549,9 +1549,11 @@
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@@ -1641,9 +1643,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -1656,9 +1656,11 @@
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@@ -1748,9 +1750,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -1763,9 +1763,11 @@
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@@ -1855,9 +1857,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -1870,9 +1870,11 @@
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@@ -1962,9 +1964,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -1977,9 +1977,11 @@
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@@ -2069,9 +2071,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -2084,9 +2084,11 @@
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@@ -2176,9 +2178,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -2191,9 +2191,11 @@
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@@ -2283,9 +2285,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -2298,9 +2298,11 @@
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@@ -2390,9 +2392,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -2405,9 +2405,11 @@
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@@ -2497,9 +2499,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -2512,9 +2512,11 @@
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@@ -2604,9 +2606,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -2619,9 +2619,11 @@
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@@ -2711,9 +2713,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -2726,9 +2726,11 @@
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@@ -2818,9 +2820,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -2833,9 +2833,11 @@
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@@ -2925,9 +2927,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -2940,9 +2940,11 @@
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@@ -3032,9 +3034,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -3047,9 +3047,11 @@
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@@ -3139,9 +3141,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -3154,9 +3154,11 @@
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@@ -3246,9 +3248,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -3261,9 +3261,11 @@
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@@ -3353,9 +3355,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -3368,9 +3368,11 @@
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@@ -3460,9 +3462,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -3475,9 +3475,11 @@
                     "portName": null,
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@@ -3567,9 +3569,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -3582,9 +3582,11 @@
                     "portName": null,
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@@ -3674,9 +3676,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3689,9 +3689,11 @@
                     "portName": null,
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@@ -3781,9 +3783,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3796,9 +3796,11 @@
                     "portName": null,
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@@ -3888,9 +3890,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -3903,9 +3903,11 @@
                     "portName": null,
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@@ -3995,9 +3997,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4010,9 +4010,11 @@
                     "portName": null,
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@@ -4102,9 +4104,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4117,9 +4117,11 @@
                     "portName": null,
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@@ -4209,9 +4211,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4224,9 +4224,11 @@
                     "portName": null,
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@@ -4316,9 +4318,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4331,9 +4331,11 @@
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@@ -4423,9 +4425,7 @@
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-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4438,9 +4438,11 @@
                     "portName": null,
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@@ -4530,9 +4532,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4545,9 +4545,11 @@
                     "portName": null,
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@@ -4637,9 +4639,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -4652,9 +4652,11 @@
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@@ -4744,9 +4746,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4759,9 +4759,11 @@
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@@ -4851,9 +4853,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4866,9 +4866,11 @@
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@@ -4958,9 +4960,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4973,9 +4973,11 @@
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@@ -5065,9 +5067,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5080,9 +5080,11 @@
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@@ -5172,9 +5174,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5187,9 +5187,11 @@
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@@ -5279,9 +5281,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5294,9 +5294,11 @@
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@@ -5386,9 +5388,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5401,9 +5401,11 @@
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@@ -5493,9 +5495,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5508,9 +5508,11 @@
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@@ -5600,9 +5602,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -5615,9 +5615,11 @@
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@@ -5707,9 +5709,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -5722,9 +5722,11 @@
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@@ -5814,9 +5816,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -5829,9 +5829,11 @@
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-                    "ifHighSpeed_prev": null
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@@ -5936,9 +5936,11 @@
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@@ -6028,9 +6030,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -6043,9 +6043,11 @@
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@@ -6135,9 +6137,7 @@
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@@ -6150,9 +6150,11 @@
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@@ -6242,9 +6244,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -6257,9 +6257,11 @@
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@@ -6349,9 +6351,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -6364,9 +6364,11 @@
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@@ -6456,9 +6458,7 @@
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-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6471,9 +6471,11 @@
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@@ -6563,9 +6565,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6578,9 +6578,11 @@
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@@ -6670,9 +6672,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6685,9 +6685,11 @@
                     "portName": null,
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@@ -6777,9 +6779,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6792,9 +6792,11 @@
                     "portName": null,
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@@ -6884,9 +6886,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6899,9 +6899,11 @@
                     "portName": null,
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@@ -6991,9 +6993,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7006,9 +7006,11 @@
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@@ -7098,9 +7100,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7113,9 +7113,11 @@
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@@ -7205,9 +7207,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7220,9 +7220,11 @@
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@@ -7312,9 +7314,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7327,9 +7327,11 @@
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@@ -7419,9 +7421,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7434,9 +7434,11 @@
                     "portName": null,
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@@ -7526,9 +7528,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7541,9 +7541,11 @@
                     "portName": null,
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@@ -7633,9 +7635,7 @@
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-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7648,9 +7648,11 @@
                     "portName": null,
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@@ -7740,9 +7742,7 @@
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@@ -7755,9 +7755,11 @@
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@@ -7847,9 +7849,7 @@
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@@ -7862,9 +7862,11 @@
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@@ -7954,9 +7956,7 @@
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@@ -8183,9 +8183,11 @@
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@@ -8397,9 +8397,11 @@
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@@ -8504,9 +8504,11 @@
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@@ -8596,9 +8598,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -8611,9 +8611,11 @@
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@@ -8718,9 +8718,11 @@
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@@ -8810,9 +8812,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -8825,9 +8825,11 @@
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@@ -8917,9 +8919,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -8932,9 +8932,11 @@
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@@ -9024,9 +9026,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -9039,9 +9039,11 @@
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@@ -9131,9 +9133,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -9146,9 +9146,11 @@
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@@ -9238,9 +9240,7 @@
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@@ -9253,9 +9253,11 @@
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@@ -9345,9 +9347,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -9360,9 +9360,11 @@
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@@ -9452,9 +9454,7 @@
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@@ -9467,9 +9467,11 @@
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@@ -9559,9 +9561,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -9574,9 +9574,11 @@
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@@ -9666,9 +9668,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -9681,9 +9681,11 @@
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@@ -9773,9 +9775,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -9788,9 +9788,11 @@
                     "portName": null,
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@@ -9880,9 +9882,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
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@@ -9899,9 +9899,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10006,9 +10006,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10113,9 +10113,11 @@
                     "portName": null,
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+                    "ifSpeed_prev": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10205,9 +10207,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10220,9 +10220,11 @@
                     "portName": null,
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+                    "ifSpeed_prev": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10327,9 +10327,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10434,9 +10434,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10541,9 +10541,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10648,9 +10648,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -10755,9 +10755,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -10862,9 +10862,11 @@
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@@ -10954,9 +10956,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -10969,9 +10969,11 @@
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@@ -11061,9 +11063,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -11076,9 +11076,11 @@
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@@ -11168,9 +11170,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -11183,9 +11183,11 @@
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@@ -11275,9 +11277,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11290,9 +11290,11 @@
                     "portName": null,
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@@ -11382,9 +11384,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11397,9 +11397,11 @@
                     "portName": null,
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@@ -11489,9 +11491,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11504,9 +11504,11 @@
                     "portName": null,
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@@ -11596,9 +11598,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11611,9 +11611,11 @@
                     "portName": null,
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@@ -11703,9 +11705,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -11718,9 +11718,11 @@
                     "portName": null,
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@@ -11810,9 +11812,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -11825,9 +11825,11 @@
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@@ -11917,9 +11919,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11932,9 +11932,11 @@
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@@ -12024,9 +12026,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -12039,9 +12039,11 @@
                     "portName": null,
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@@ -12131,9 +12133,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -12146,9 +12146,11 @@
                     "portName": null,
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@@ -12238,9 +12240,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12253,9 +12253,11 @@
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@@ -12345,9 +12347,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -12360,9 +12360,11 @@
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@@ -12452,9 +12454,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12467,9 +12467,11 @@
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@@ -12559,9 +12561,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12574,9 +12574,11 @@
                     "portName": null,
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@@ -12666,9 +12668,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12681,9 +12681,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -12773,9 +12775,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -12788,9 +12788,11 @@
                     "portName": null,
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@@ -12880,9 +12882,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -12895,9 +12895,11 @@
                     "portName": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -12987,9 +12989,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13002,9 +13002,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -13094,9 +13096,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13109,9 +13109,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -13201,9 +13203,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13216,9 +13216,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -13308,9 +13310,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13323,9 +13323,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -13415,9 +13417,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13430,9 +13430,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -13522,9 +13524,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13537,9 +13537,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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                     "ifOperStatus": "down",
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@@ -13629,9 +13631,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -13644,9 +13644,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -13736,9 +13738,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13751,9 +13751,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13858,9 +13858,11 @@
                     "portName": null,
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                     "ifSpeed": 1244000000,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
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-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -13965,9 +13965,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -14072,9 +14072,11 @@
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@@ -14164,9 +14166,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -14179,9 +14179,11 @@
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@@ -14271,9 +14273,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -14286,9 +14286,11 @@
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@@ -14378,9 +14380,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -14393,9 +14393,11 @@
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@@ -14485,9 +14487,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14500,9 +14500,11 @@
                     "portName": null,
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@@ -14592,9 +14594,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14607,9 +14607,11 @@
                     "portName": null,
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@@ -14699,9 +14701,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -14714,9 +14714,11 @@
                     "portName": null,
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@@ -14806,9 +14808,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -14821,9 +14821,11 @@
                     "portName": null,
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@@ -14913,9 +14915,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -14928,9 +14928,11 @@
                     "portName": null,
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@@ -15020,9 +15022,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15035,9 +15035,11 @@
                     "portName": null,
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@@ -15127,9 +15129,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15142,9 +15142,11 @@
                     "portName": null,
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@@ -15234,9 +15236,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15249,9 +15249,11 @@
                     "portName": null,
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@@ -15341,9 +15343,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15356,9 +15356,11 @@
                     "portName": null,
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@@ -15448,9 +15450,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15463,9 +15463,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -15555,9 +15557,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15570,9 +15570,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -15662,9 +15664,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15677,9 +15677,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -15769,9 +15771,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -15784,9 +15784,11 @@
                     "portName": null,
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@@ -15876,9 +15878,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15891,9 +15891,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -15983,9 +15985,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -15998,9 +15998,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16090,9 +16092,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16212,9 +16212,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16319,9 +16319,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -16411,9 +16413,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16426,9 +16426,11 @@
                     "portName": null,
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                     "ifSpeed": 0,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -16518,9 +16520,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16533,9 +16533,11 @@
                     "portName": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -16625,9 +16627,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16640,9 +16640,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -16732,9 +16734,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16747,9 +16747,11 @@
                     "portName": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -16839,9 +16841,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16854,9 +16854,11 @@
                     "portName": null,
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                     "ifOperStatus": "down",
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@@ -16946,9 +16948,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -16961,9 +16961,11 @@
                     "portName": null,
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+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": "up",
@@ -17053,9 +17055,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -17068,9 +17068,11 @@
                     "portName": null,
                     "ifIndex": 1077943808,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17160,9 +17162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17175,9 +17175,11 @@
                     "portName": null,
                     "ifIndex": 1077944320,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17267,9 +17269,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17282,9 +17282,11 @@
                     "portName": null,
                     "ifIndex": 1077944832,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17374,9 +17376,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17389,9 +17389,11 @@
                     "portName": null,
                     "ifIndex": 1077945344,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17481,9 +17483,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 1077945856,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 1077946368,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 1077946880,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 1077947392,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 1077947904,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 1077948416,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 1077948928,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 1077949440,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 1077949952,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 1077950464,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 1077950976,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 1077951488,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 1077952000,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 1077952512,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 1077953024,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 1077953536,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 1077954048,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 1079377920,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 1081475072,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 1087766528,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 1094057984,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ntron.json b/tests/data/ntron.json
index f516a0e0ee..d0d03a1b4d 100644
--- a/tests/data/ntron.json
+++ b/tests/data/ntron.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 615001156,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 614488090,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 454271799,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 615009309,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 614933235,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 615033674,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 615033675,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 125082558,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 1,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/occamos_b6-256.json b/tests/data/occamos_b6-256.json
index 0829e5ff25..bca314e5ad 100644
--- a/tests/data/occamos_b6-256.json
+++ b/tests/data/occamos_b6-256.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 4294967295,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 4294967295,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 4294967295,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 4294967295,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 128000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 128000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/occamos_blc-6252.json b/tests/data/occamos_blc-6252.json
index 845aacc129..0585bb0d62 100644
--- a/tests/data/occamos_blc-6252.json
+++ b/tests/data/occamos_blc-6252.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 11996000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 12000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/openbsd.json b/tests/data/openbsd.json
index 7eb447fd0f..14a1b4d727 100644
--- a/tests/data/openbsd.json
+++ b/tests/data/openbsd.json
@@ -10,11 +10,11 @@
                     "version": null,
                     "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "openbsd",
                     "type": "server",
                     "serial": null,
-                    "icon": "openbsd.svg"
+                    "icon": "openbsd.svg",
+                    "location": null
                 }
             ]
         },
@@ -28,11 +28,11 @@
                     "version": null,
                     "hardware": null,
                     "features": null,
-                    "location": "<private>",
                     "os": "openbsd",
                     "type": "server",
                     "serial": null,
-                    "icon": "openbsd.svg"
+                    "icon": "openbsd.svg",
+                    "location": "<private>"
                 }
             ]
         }
diff --git a/tests/data/openbsd_1.json b/tests/data/openbsd_1.json
index 0fb852695b..aad638ffc3 100644
--- a/tests/data/openbsd_1.json
+++ b/tests/data/openbsd_1.json
@@ -8,13 +8,13 @@
                     "sysDescr": "OpenBSD hostname 5.3 GENERIC.MP#58 i386",
                     "sysContact": null,
                     "version": null,
-                    "hardware": "",
+                    "hardware": null,
                     "features": null,
-                    "location": null,
                     "os": "openbsd",
                     "type": "server",
                     "serial": null,
-                    "icon": "openbsd.svg"
+                    "icon": "openbsd.svg",
+                    "location": null
                 }
             ]
         },
@@ -28,11 +28,11 @@
                     "version": "5.3",
                     "hardware": "i386",
                     "features": "GENERIC.MP#58",
-                    "location": null,
                     "os": "openbsd",
                     "type": "server",
                     "serial": null,
-                    "icon": "openbsd.svg"
+                    "icon": "openbsd.svg",
+                    "location": null
                 }
             ]
         }
diff --git a/tests/data/opengear.json b/tests/data/opengear.json
index 9154f2dff6..22200dc654 100644
--- a/tests/data/opengear.json
+++ b/tests/data/opengear.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/orvaldi-ups.json b/tests/data/orvaldi-ups.json
index 227ecb8818..4ffce60b1a 100644
--- a/tests/data/orvaldi-ups.json
+++ b/tests/data/orvaldi-ups.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -1197,7 +1197,7 @@
                     "mempool_type": "hrstorage",
                     "mempool_precision": 1024,
                     "mempool_descr": "Physical memory",
-                    "mempool_perc": 26,
+                    "mempool_perc": 27,
                     "mempool_used": 33697792,
                     "mempool_free": 93466624,
                     "mempool_total": 127164416,
@@ -1213,7 +1213,7 @@
                     "mempool_type": "hrstorage",
                     "mempool_precision": 1024,
                     "mempool_descr": "Virtual memory",
-                    "mempool_perc": 26,
+                    "mempool_perc": 27,
                     "mempool_used": 33697792,
                     "mempool_free": 93466624,
                     "mempool_total": 127164416,
diff --git a/tests/data/packetlight_pl-1000e.json b/tests/data/packetlight_pl-1000e.json
index bf5a267046..67e6d918c1 100644
--- a/tests/data/packetlight_pl-1000e.json
+++ b/tests/data/packetlight_pl-1000e.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 67072,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 115456,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 115457,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 115712,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 180992,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 180993,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 181248,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 246528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 246529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 246784,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 312064,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 312065,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 312320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 329216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 377600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 377601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 377856,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 443136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 443137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 443392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 508672,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 508673,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 508928,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 574208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 574209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 574464,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 604160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 640000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 669696,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 705536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 735232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 771072,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 800768,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 836608,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 866304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 902144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 931840,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 967680,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
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@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 1012992,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -4209,9 +4211,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 1033216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -4316,9 +4318,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -4331,9 +4331,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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@@ -4423,9 +4425,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 1098752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 1164288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 1229824,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 6620672,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 6625280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 6693120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 67072,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 115456,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 115457,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
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                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 115712,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 180992,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 180993,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 181248,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
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                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
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                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 246528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 246529,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 246784,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 312064,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 312065,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 312320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 329216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 377600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 377601,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 377856,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 443136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 443137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 443392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 508672,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 508673,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 508928,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 574208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 574209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 574464,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 604160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 640000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 669696,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 705536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 735232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 771072,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 800768,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 836608,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 866304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 902144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 931840,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 967680,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 1012992,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 1033216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 1078528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 1098752,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 1164288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 1229824,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "down",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 6620672,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 6625280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 6693120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/panasonic-ns.json b/tests/data/panasonic-ns.json
index abf98b84e3..e2eb881329 100644
--- a/tests/data/panasonic-ns.json
+++ b/tests/data/panasonic-ns.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/panduit-eagle.json b/tests/data/panduit-eagle.json
index 7669695d57..6d1a3d9c58 100644
--- a/tests/data/panduit-eagle.json
+++ b/tests/data/panduit-eagle.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/patton-sn.json b/tests/data/patton-sn.json
index 0227f5b528..e2d96d6c85 100644
--- a/tests/data/patton-sn.json
+++ b/tests/data/patton-sn.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -865,7 +865,7 @@
                     "mempool_type": "patton-sn",
                     "mempool_precision": 1,
                     "mempool_descr": "System Heap Memory",
-                    "mempool_perc": 4,
+                    "mempool_perc": 5,
                     "mempool_used": 10997440,
                     "mempool_free": 233509184,
                     "mempool_total": 244506624,
diff --git a/tests/data/pcoweb-rittalchiller.json b/tests/data/pcoweb-rittalchiller.json
index 0f8800e41c..b45cbac530 100644
--- a/tests/data/pcoweb-rittalchiller.json
+++ b/tests/data/pcoweb-rittalchiller.json
@@ -831,9 +831,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -923,9 +925,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -938,9 +938,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1030,9 +1032,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1049,9 +1049,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1141,9 +1143,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1156,9 +1156,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1248,9 +1250,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/pegasus.json b/tests/data/pegasus.json
index a88957b67f..8cee4109d6 100644
--- a/tests/data/pegasus.json
+++ b/tests/data/pegasus.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 1002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 1004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 1005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 5010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 5020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 5030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 5040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 5050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 5060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 5070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 5080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 6010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 6020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 6030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 6040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 6050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 6060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 6070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 6080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 7010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 7020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 7030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 7040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 7050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 7060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 7070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 7080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 8010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 8020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 8030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 8040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 8050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 8060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 8070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 8080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 9010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 9020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 9030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 9040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 9050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 9060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 9070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 9080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 10010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 10020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 10030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 10040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 10050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 10060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 10070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 10080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 1001,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 2635956,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 1002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 1003,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 1004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 1005,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 702172,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 5010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 5020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 5030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 5050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 5060,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 5070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 5080,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 6010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 6020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 6030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 6040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 6050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 6060,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 6070,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 6080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 7010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 7020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 7030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 7040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 7050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 7060,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 7070,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 7080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 8010,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 8020,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 8030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 8040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 8050,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 8060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 8070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 8080,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 9010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 9020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 9030,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 9040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 9050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 9060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 9070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 9080,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 10010,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 10020,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 10030,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 10040,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 10050,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 10060,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 10070,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 10080,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/pfsense.json b/tests/data/pfsense.json
index 912a7daa42..c7aadecb7c 100644
--- a/tests/data/pfsense.json
+++ b/tests/data/pfsense.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "dormant",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 2283596,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "dormant",
                     "ifOperStatus_prev": "dormant",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/picos.json b/tests/data/picos.json
index 3ace1284d0..0c02ae8744 100644
--- a/tests/data/picos.json
+++ b/tests/data/picos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 13001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 13002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 13003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 13004,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 13351,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 13404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 13406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 13408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 13410,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 13412,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 13414,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 13416,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 13500,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 14088,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 14095,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 13001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 13002,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 13003,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 13004,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 13351,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 13404,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 13406,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 13408,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 13410,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 13412,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 13414,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 13416,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 13500,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 14088,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 14095,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/planetos_igs-10020mt.json b/tests/data/planetos_igs-10020mt.json
index 5ff79c3842..38e7c83393 100644
--- a/tests/data/planetos_igs-10020mt.json
+++ b/tests/data/planetos_igs-10020mt.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 50001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 50130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 50330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 50331,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 51998,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 60001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 959494354,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 982565757,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 999973939,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 926157395,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 1208011,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 50001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 50130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 50330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 50331,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 51998,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 60001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 39,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/pmp.json b/tests/data/pmp.json
index 5f094b4a4c..26482eb82a 100644
--- a/tests/data/pmp.json
+++ b/tests/data/pmp.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 194969600000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 194969600,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/pmp_450.json b/tests/data/pmp_450.json
index 2a7e82e815..980437f974 100644
--- a/tests/data/pmp_450.json
+++ b/tests/data/pmp_450.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/pmp_450m.json b/tests/data/pmp_450m.json
index 57edc4d279..cae428b0f3 100644
--- a/tests/data/pmp_450m.json
+++ b/tests/data/pmp_450m.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 194969600000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 194969600,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/procera.json b/tests/data/procera.json
index 49309bd392..100e4b489c 100644
--- a/tests/data/procera.json
+++ b/tests/data/procera.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/procurve_2520.json b/tests/data/procurve_2520.json
index 6f9df21186..722f6ed392 100644
--- a/tests/data/procurve_2520.json
+++ b/tests/data/procurve_2520.json
@@ -592,9 +592,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -684,9 +686,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -699,9 +699,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -791,9 +793,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -806,9 +806,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -898,9 +900,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -913,9 +913,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1005,9 +1007,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1020,9 +1020,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1112,9 +1114,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1127,9 +1127,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1219,9 +1221,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1234,9 +1234,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1326,9 +1328,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1341,9 +1341,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1433,9 +1435,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1448,9 +1448,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1540,9 +1542,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1555,9 +1555,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1647,9 +1649,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1662,9 +1662,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1754,9 +1756,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1769,9 +1769,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1861,9 +1863,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1876,9 +1876,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1968,9 +1970,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1983,9 +1983,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2075,9 +2077,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2090,9 +2090,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2182,9 +2184,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2197,9 +2197,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2289,9 +2291,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2304,9 +2304,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2396,9 +2398,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2411,9 +2411,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2503,9 +2505,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2518,9 +2518,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2610,9 +2612,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2625,9 +2625,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2717,9 +2719,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2732,9 +2732,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2824,9 +2826,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2839,9 +2839,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2931,9 +2933,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2946,9 +2946,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3038,9 +3040,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3053,9 +3053,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3145,9 +3147,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3160,9 +3160,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3252,9 +3254,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3267,9 +3267,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3359,9 +3361,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3374,9 +3374,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3466,9 +3468,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3481,9 +3481,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3573,9 +3575,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3588,9 +3588,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3680,9 +3682,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3695,9 +3695,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3787,9 +3789,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3802,9 +3802,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3894,9 +3896,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3909,9 +3909,11 @@
                     "portName": null,
                     "ifIndex": 507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4001,9 +4003,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4016,9 +4016,11 @@
                     "portName": null,
                     "ifIndex": 693,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4108,9 +4110,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4123,9 +4123,11 @@
                     "portName": null,
                     "ifIndex": 1056,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4215,9 +4217,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4230,9 +4230,11 @@
                     "portName": null,
                     "ifIndex": 2101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4322,9 +4324,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4337,9 +4337,11 @@
                     "portName": null,
                     "ifIndex": 2138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4429,9 +4431,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4444,9 +4444,11 @@
                     "portName": null,
                     "ifIndex": 4152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4536,9 +4538,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4551,9 +4551,11 @@
                     "portName": null,
                     "ifIndex": 4153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4643,9 +4645,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4658,9 +4658,11 @@
                     "portName": null,
                     "ifIndex": 4154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4750,9 +4752,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4765,9 +4765,11 @@
                     "portName": null,
                     "ifIndex": 4155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4857,9 +4859,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4872,9 +4872,11 @@
                     "portName": null,
                     "ifIndex": 4156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4964,9 +4966,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4979,9 +4979,11 @@
                     "portName": null,
                     "ifIndex": 4157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5071,9 +5073,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5086,9 +5086,11 @@
                     "portName": null,
                     "ifIndex": 4158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5178,9 +5180,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5193,9 +5193,11 @@
                     "portName": null,
                     "ifIndex": 4159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5285,9 +5287,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5304,9 +5304,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5396,9 +5398,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5411,9 +5411,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5503,9 +5505,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5518,9 +5518,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5610,9 +5612,7 @@
                     "ifOutMulticastPkts": 32237493,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5625,9 +5625,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5717,9 +5719,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5732,9 +5732,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5824,9 +5826,7 @@
                     "ifOutMulticastPkts": 1559563,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5839,9 +5839,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5931,9 +5933,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5946,9 +5946,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6038,9 +6040,7 @@
                     "ifOutMulticastPkts": 32278230,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6053,9 +6053,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6145,9 +6147,7 @@
                     "ifOutMulticastPkts": 32152697,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6160,9 +6160,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6252,9 +6254,7 @@
                     "ifOutMulticastPkts": 32263876,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6267,9 +6267,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6359,9 +6361,7 @@
                     "ifOutMulticastPkts": 32278227,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6374,9 +6374,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6466,9 +6468,7 @@
                     "ifOutMulticastPkts": 1409053,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6481,9 +6481,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6573,9 +6575,7 @@
                     "ifOutMulticastPkts": 32278093,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6588,9 +6588,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6680,9 +6682,7 @@
                     "ifOutMulticastPkts": 32225310,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6695,9 +6695,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6787,9 +6789,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6802,9 +6802,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6894,9 +6896,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6909,9 +6909,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7001,9 +7003,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7016,9 +7016,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7108,9 +7110,7 @@
                     "ifOutMulticastPkts": 32124628,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7123,9 +7123,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7215,9 +7217,7 @@
                     "ifOutMulticastPkts": 18282697,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7230,9 +7230,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7322,9 +7324,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7337,9 +7337,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7429,9 +7431,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7444,9 +7444,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7536,9 +7538,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7551,9 +7551,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7643,9 +7645,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7658,9 +7658,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7750,9 +7752,7 @@
                     "ifOutMulticastPkts": 20529930,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7765,9 +7765,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7857,9 +7859,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7872,9 +7872,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7964,9 +7966,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7979,9 +7979,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8071,9 +8073,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8086,9 +8086,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8178,9 +8180,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8193,9 +8193,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8285,9 +8287,7 @@
                     "ifOutMulticastPkts": 871907,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8300,9 +8300,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8392,9 +8394,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8407,9 +8407,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8499,9 +8501,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8514,9 +8514,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8606,9 +8608,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8621,9 +8621,11 @@
                     "portName": null,
                     "ifIndex": 507,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8713,9 +8715,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8728,9 +8728,11 @@
                     "portName": null,
                     "ifIndex": 693,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8820,9 +8822,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8835,9 +8835,11 @@
                     "portName": null,
                     "ifIndex": 1056,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8927,9 +8929,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8942,9 +8942,11 @@
                     "portName": null,
                     "ifIndex": 2101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9034,9 +9036,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9049,9 +9049,11 @@
                     "portName": null,
                     "ifIndex": 2138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9141,9 +9143,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9156,9 +9156,11 @@
                     "portName": null,
                     "ifIndex": 4152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9248,9 +9250,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9263,9 +9263,11 @@
                     "portName": null,
                     "ifIndex": 4153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9355,9 +9357,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9370,9 +9370,11 @@
                     "portName": null,
                     "ifIndex": 4154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9462,9 +9464,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9477,9 +9477,11 @@
                     "portName": null,
                     "ifIndex": 4155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9569,9 +9571,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9584,9 +9584,11 @@
                     "portName": null,
                     "ifIndex": 4156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9676,9 +9678,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9691,9 +9691,11 @@
                     "portName": null,
                     "ifIndex": 4157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9783,9 +9785,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9798,9 +9798,11 @@
                     "portName": null,
                     "ifIndex": 4158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9890,9 +9892,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9905,9 +9905,11 @@
                     "portName": null,
                     "ifIndex": 4159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9997,9 +9999,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/protelevision-t1.json b/tests/data/protelevision-t1.json
index feba2e751c..a8003c17c4 100644
--- a/tests/data/protelevision-t1.json
+++ b/tests/data/protelevision-t1.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ptp670.json b/tests/data/ptp670.json
index aa5aa02dfd..c1a5bfe4f4 100644
--- a/tests/data/ptp670.json
+++ b/tests/data/ptp670.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 323000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 323,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "main ",
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/radlan.json b/tests/data/radlan.json
index 9a5ae0e6fc..16d2b41d80 100644
--- a/tests/data/radlan.json
+++ b/tests/data/radlan.json
@@ -25,9 +25,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -117,9 +119,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -132,9 +132,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -224,9 +226,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -239,9 +239,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -331,9 +333,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -346,9 +346,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -438,9 +440,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -453,9 +453,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -545,9 +547,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -560,9 +560,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -652,9 +654,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -667,9 +667,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -759,9 +761,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -774,9 +774,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -866,9 +868,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -881,9 +881,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -973,9 +975,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -988,9 +988,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1080,9 +1082,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1095,9 +1095,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1187,9 +1189,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1202,9 +1202,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1294,9 +1296,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1309,9 +1309,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1401,9 +1403,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1416,9 +1416,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1508,9 +1510,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1523,9 +1523,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1615,9 +1617,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1630,9 +1630,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1722,9 +1724,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1737,9 +1737,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1829,9 +1831,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1844,9 +1844,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1936,9 +1938,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1951,9 +1951,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2043,9 +2045,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2058,9 +2058,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2150,9 +2152,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2165,9 +2165,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2257,9 +2259,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2272,9 +2272,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2364,9 +2366,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2379,9 +2379,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2471,9 +2473,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2486,9 +2486,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2578,9 +2580,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2593,9 +2593,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2685,9 +2687,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2700,9 +2700,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2792,9 +2794,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2807,9 +2807,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2899,9 +2901,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2914,9 +2914,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3006,9 +3008,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3021,9 +3021,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3113,9 +3115,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3128,9 +3128,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3220,9 +3222,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3235,9 +3235,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3327,9 +3329,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3342,9 +3342,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3434,9 +3436,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3449,9 +3449,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3541,9 +3543,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3556,9 +3556,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3648,9 +3650,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3663,9 +3663,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3755,9 +3757,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3770,9 +3770,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3862,9 +3864,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3877,9 +3877,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3969,9 +3971,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3984,9 +3984,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4076,9 +4078,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4091,9 +4091,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4183,9 +4185,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4198,9 +4198,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4290,9 +4292,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4305,9 +4305,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4397,9 +4399,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4412,9 +4412,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4504,9 +4506,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4519,9 +4519,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4611,9 +4613,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4626,9 +4626,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4718,9 +4720,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4733,9 +4733,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4825,9 +4827,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4840,9 +4840,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4932,9 +4934,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4947,9 +4947,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5039,9 +5041,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5054,9 +5054,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5146,9 +5148,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5161,9 +5161,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5253,9 +5255,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5268,9 +5268,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5360,9 +5362,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5375,9 +5375,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5467,9 +5469,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5486,9 +5486,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5578,9 +5580,7 @@
                     "ifOutMulticastPkts": 48651,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5593,9 +5593,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5685,9 +5687,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5700,9 +5700,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5792,9 +5794,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5807,9 +5807,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5899,9 +5901,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5914,9 +5914,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6006,9 +6008,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6021,9 +6021,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6113,9 +6115,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6128,9 +6128,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6220,9 +6222,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6235,9 +6235,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6327,9 +6329,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6342,9 +6342,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6434,9 +6436,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6449,9 +6449,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6541,9 +6543,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6556,9 +6556,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6648,9 +6650,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6663,9 +6663,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6755,9 +6757,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6770,9 +6770,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6862,9 +6864,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6877,9 +6877,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6969,9 +6971,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6984,9 +6984,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7076,9 +7078,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7091,9 +7091,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7183,9 +7185,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7198,9 +7198,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7290,9 +7292,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7305,9 +7305,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7397,9 +7399,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7412,9 +7412,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7504,9 +7506,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7519,9 +7519,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7611,9 +7613,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7626,9 +7626,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7718,9 +7720,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7733,9 +7733,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7825,9 +7827,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7840,9 +7840,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7932,9 +7934,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7947,9 +7947,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8039,9 +8041,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8054,9 +8054,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8146,9 +8148,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8161,9 +8161,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8253,9 +8255,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8268,9 +8268,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8360,9 +8362,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8375,9 +8375,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8467,9 +8469,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8482,9 +8482,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8574,9 +8576,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8589,9 +8589,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8681,9 +8683,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8696,9 +8696,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8788,9 +8790,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8803,9 +8803,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8895,9 +8897,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8910,9 +8910,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9002,9 +9004,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9017,9 +9017,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9109,9 +9111,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9124,9 +9124,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9216,9 +9218,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9231,9 +9231,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9323,9 +9325,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9338,9 +9338,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9430,9 +9432,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9445,9 +9445,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9537,9 +9539,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9552,9 +9552,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9644,9 +9646,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9659,9 +9659,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9751,9 +9753,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9766,9 +9766,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9858,9 +9860,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9873,9 +9873,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9965,9 +9967,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9980,9 +9980,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10072,9 +10074,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10087,9 +10087,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10179,9 +10181,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10194,9 +10194,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10286,9 +10288,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10301,9 +10301,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10393,9 +10395,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10408,9 +10408,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10500,9 +10502,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10515,9 +10515,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10607,9 +10609,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10622,9 +10622,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10714,9 +10716,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10729,9 +10729,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10821,9 +10823,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10836,9 +10836,11 @@
                     "portName": null,
                     "ifIndex": 100000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10928,9 +10930,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/radwin_5200-0150.json b/tests/data/radwin_5200-0150.json
index 2ce9495e0f..4df36a820f 100644
--- a/tests/data/radwin_5200-0150.json
+++ b/tests/data/radwin_5200-0150.json
@@ -229,9 +229,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -321,9 +323,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -340,9 +340,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -432,9 +434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/radwin_5550-0150.json b/tests/data/radwin_5550-0150.json
index 6c36551af2..e7ff0ee939 100644
--- a/tests/data/radwin_5550-0150.json
+++ b/tests/data/radwin_5550-0150.json
@@ -229,9 +229,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -321,9 +323,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -340,9 +340,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -432,9 +434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/radwin_5550-0h50.json b/tests/data/radwin_5550-0h50.json
index ae11226e00..fec1532fc8 100644
--- a/tests/data/radwin_5550-0h50.json
+++ b/tests/data/radwin_5550-0h50.json
@@ -229,9 +229,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -321,9 +323,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -340,9 +340,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -432,9 +434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/raritan-pdu_px2_temp.json b/tests/data/raritan-pdu_px2_temp.json
index bf51017517..355d1fcedc 100644
--- a/tests/data/raritan-pdu_px2_temp.json
+++ b/tests/data/raritan-pdu_px2_temp.json
@@ -34,9 +34,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -126,9 +128,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -141,9 +141,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -233,9 +235,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -248,9 +248,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -340,9 +342,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -355,9 +355,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -447,9 +449,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -466,9 +466,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -558,9 +560,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -573,9 +573,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -665,9 +667,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -680,9 +680,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -772,9 +774,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -787,9 +787,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -879,9 +881,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/recoveryos.json b/tests/data/recoveryos.json
index 0a0e9e625e..916c0e7b1e 100644
--- a/tests/data/recoveryos.json
+++ b/tests/data/recoveryos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/recoveryos_8024s.json b/tests/data/recoveryos_8024s.json
index ab10d4da6f..1374284bcf 100644
--- a/tests/data/recoveryos_8024s.json
+++ b/tests/data/recoveryos_8024s.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/riello.json b/tests/data/riello.json
index 32b9c9a51b..757fbfa336 100644
--- a/tests/data/riello.json
+++ b/tests/data/riello.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/rittal-cmc.json b/tests/data/rittal-cmc.json
index b3ea35718a..130bba988e 100644
--- a/tests/data/rittal-cmc.json
+++ b/tests/data/rittal-cmc.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/routeros_crs317.json b/tests/data/routeros_crs317.json
index 543465a12d..016b6a238b 100644
--- a/tests/data/routeros_crs317.json
+++ b/tests/data/routeros_crs317.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/routeros_rblhgr.json b/tests/data/routeros_rblhgr.json
index e5aff0e1b2..b04a0e0d37 100644
--- a/tests/data/routeros_rblhgr.json
+++ b/tests/data/routeros_rblhgr.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 918,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/ruijie.json b/tests/data/ruijie.json
index 4c845446d4..b83e8b63cc 100644
--- a/tests/data/ruijie.json
+++ b/tests/data/ruijie.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 4095,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 4096,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 5639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 16385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 29169753,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 30218515,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 31514690,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 4798352,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 18523430,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 32049578,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 32452154,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 33252359,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 26670380,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 26670567,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 30818164,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 28846856,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 31651366,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 28190620,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 26512983,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 26737631,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 30866137,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 30224798,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 28889689,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 30662376,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 29951936,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 25898281,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 30796684,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 28288579,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 32847195,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 36223409,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 30670113,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 33932618,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 24343858,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 22151107,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 27562852,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 32211071,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 19980791,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 27065468,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 17287849,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 3864155,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 2904852,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 2751119,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 3183335,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 2259584,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 32851084,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 2223215,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 35074285,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 4095,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 4096,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 5639,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 16385,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/rutos-2xx.json b/tests/data/rutos-2xx.json
index 5bb9385c8f..59280a6a50 100644
--- a/tests/data/rutos-2xx.json
+++ b/tests/data/rutos-2xx.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -2991,7 +2991,7 @@
                     "group": "Mobile",
                     "sensor_divisor": 60,
                     "sensor_multiplier": 1,
-                    "sensor_current": 253.48333333333332,
+                    "sensor_current": 253.48333333333,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -3323,7 +3323,375 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.15.0",
+                    "sensor_index": "simSlot.0",
+                    "sensor_type": "rutos-2xx",
+                    "sensor_descr": "Number of SIM Slots",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "runtime",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.17.0",
+                    "sensor_index": "ConnectionUptime.0",
+                    "sensor_type": "rutos-2xx",
+                    "sensor_descr": "Connection Uptime ",
+                    "group": "Mobile",
+                    "sensor_divisor": 60,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 253.48333333333,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": 253.48333333333,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "signal",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.4.0",
+                    "sensor_index": "Signal.0",
+                    "sensor_type": "rutos-2xx",
+                    "sensor_descr": "Signal Level",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -103,
+                    "sensor_limit": -30,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": -80,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": "Signal",
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.7.0",
+                    "sensor_index": "ConnectionState.0",
+                    "sensor_type": "ConnectionState",
+                    "sensor_descr": "Connection State (Orange SK)",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "ConnectionState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.8.0",
+                    "sensor_index": "ConnectionType.0",
+                    "sensor_type": "ConnectionType",
+                    "sensor_descr": "Connection Type (Orange SK)",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 4,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "ConnectionType"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.3.0",
+                    "sensor_index": "0",
+                    "sensor_type": "NetState",
+                    "sensor_descr": "Mobile Net State",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "NetState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.2.0",
+                    "sensor_index": "0",
+                    "sensor_type": "rutos2xx_pinState",
+                    "sensor_descr": "Pin State",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 2,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "rutos2xx_pinState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.1.0",
+                    "sensor_index": "0",
+                    "sensor_type": "simState",
+                    "sensor_descr": "SIM State",
+                    "group": "Mobile",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "simState"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.48690.2.9.0",
+                    "sensor_index": "Temperature.0",
+                    "sensor_type": "rutos-2xx",
+                    "sensor_descr": "Module Temp",
+                    "group": "Modem",
+                    "sensor_divisor": 10,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 42,
+                    "sensor_limit": 62,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 32,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "ConnectionState",
+                    "state_descr": "connected",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "ConnectionState",
+                    "state_descr": "not connected",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "ConnectionState",
+                    "state_descr": "disconnected",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "LTE",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "4G",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "3G",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "2G",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "WCDMA",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "ConnectionType",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 5,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "NetState",
+                    "state_descr": "searching",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "NetState",
+                    "state_descr": "registered (home)",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "NetState",
+                    "state_descr": "registered (roaming)",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "NetState",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "NetState",
+                    "state_descr": "unregistered",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "rutos2xx_pinState",
+                    "state_descr": "PIN REQUIRED",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "rutos2xx_pinState",
+                    "state_descr": "NOT READY",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "rutos2xx_pinState",
+                    "state_descr": "READY",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "rutos2xx_pinState",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 3
+                },
+                {
+                    "state_name": "simState",
+                    "state_descr": "inserted",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "simState",
+                    "state_descr": "not inserted",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "simState",
+                    "state_descr": "unknown",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 3
+                }
+            ]
+        }
     },
     "storage": {
         "discovery": {
diff --git a/tests/data/rutos.json b/tests/data/rutos.json
index a217cf4af8..ba40146e11 100644
--- a/tests/data/rutos.json
+++ b/tests/data/rutos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/saf-cfm.json b/tests/data/saf-cfm.json
index 507a40af5e..5ea87eeb2f 100644
--- a/tests/data/saf-cfm.json
+++ b/tests/data/saf-cfm.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "samsung ks50100 ethernet",
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "slip interface",
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 115200,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/schleifenbauer.json b/tests/data/schleifenbauer.json
index 7f0d78398b..1888314e33 100644
--- a/tests/data/schleifenbauer.json
+++ b/tests/data/schleifenbauer.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/screenos.json b/tests/data/screenos.json
index 11d1221db2..b37bb14cf8 100644
--- a/tests/data/screenos.json
+++ b/tests/data/screenos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 4294000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 4294,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 4294000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 4294,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sentry3.json b/tests/data/sentry3.json
index 83588cb515..fe2137849b 100644
--- a/tests/data/sentry3.json
+++ b/tests/data/sentry3.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sentry4.json b/tests/data/sentry4.json
index dc7b879b54..15197e2840 100644
--- a/tests/data/sentry4.json
+++ b/tests/data/sentry4.json
@@ -4594,9 +4594,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4686,9 +4688,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4701,9 +4701,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4793,9 +4795,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -4812,9 +4812,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4904,9 +4906,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4919,9 +4919,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5011,9 +5013,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sentry4_switched8i.json b/tests/data/sentry4_switched8i.json
index 4e2c2f78dd..bce1c439ec 100644
--- a/tests/data/sentry4_switched8i.json
+++ b/tests/data/sentry4_switched8i.json
@@ -34,9 +34,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -126,9 +128,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -141,9 +141,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -233,9 +235,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -252,9 +252,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -344,9 +346,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -359,9 +359,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -451,9 +453,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/siklu.json b/tests/data/siklu.json
index f4dbf33977..3571811493 100644
--- a/tests/data/siklu.json
+++ b/tests/data/siklu.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 574000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 574,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 2300818486,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 842043,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 1072039,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/siteboss_2.json b/tests/data/siteboss_2.json
index 7139a64f5f..7fbf07fff0 100644
--- a/tests/data/siteboss_2.json
+++ b/tests/data/siteboss_2.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1767,9 +1767,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1859,9 +1861,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": null,
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sixnet.json b/tests/data/sixnet.json
index 85b6b38524..9cd963c524 100644
--- a/tests/data/sixnet.json
+++ b/tests/data/sixnet.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 9900,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 9901,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 9902,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 9903,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 9904,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 9905,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 9906,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 9907,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 9908,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 0 on slx-8ms-1 ",
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 9900,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "down",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 1 on slx-8ms-1 ",
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 9901,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 2 on slx-8ms-1 ",
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 9902,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 3 on slx-8ms-1 ",
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 9903,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 4 on slx-8ms-1 ",
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 9904,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 5 on slx-8ms-1 ",
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 9905,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 6 on slx-8ms-1 ",
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 9906,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 7 on slx-8ms-1 ",
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 9907,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "port 8 on slx-8ms-1 ",
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 9908,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/smartax-mdu.json b/tests/data/smartax-mdu.json
index 3f4e46984a..67a723f522 100644
--- a/tests/data/smartax-mdu.json
+++ b/tests/data/smartax-mdu.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 647,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 775,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 234889280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 234889344,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 234889408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 234889472,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 234889536,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 234889600,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 234889664,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 234889728,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 234889792,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 234889856,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -1763,9 +1763,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 234890240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
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@@ -2390,9 +2392,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -2497,9 +2499,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -2604,9 +2606,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -2619,9 +2619,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -2711,9 +2713,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -2818,9 +2820,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -3139,9 +3141,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 519,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 647,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 775,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 234889280,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 3802347420,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 234889344,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 2447591066,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
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                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 4586896,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 234889472,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 4586907,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 234889536,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 4586910,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 234889600,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 4586910,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 234889664,
                     "ifSpeed": 10000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 1033427830,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 234889728,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 4586908,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 234889792,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 1013770516,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 234889856,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 4586911,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 234889920,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 4586902,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 234889984,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 4586908,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 234890048,
                     "ifSpeed": 10000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 13762491,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 234890112,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 4586911,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 234890176,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 4586906,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 234890240,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 4586906,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 234890304,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 4586909,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 234890368,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 4586909,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 234890432,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 4586910,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 234890496,
                     "ifSpeed": 10000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 9175321,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 234890560,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 4586910,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 234890624,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 4586911,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 234890688,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 4586908,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 234890752,
                     "ifSpeed": 100000000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 4586906,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/snr.json b/tests/data/snr.json
index 32f23135ae..d410ed09c7 100644
--- a/tests/data/snr.json
+++ b/tests/data/snr.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 11001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 11011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mx5",
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mx5",
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mx5",
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "uplink",
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 11001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 11011,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/solidserver.json b/tests/data/solidserver.json
index bdb7b041b3..1d36af6266 100644
--- a/tests/data/solidserver.json
+++ b/tests/data/solidserver.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sonicwall_sma-400.json b/tests/data/sonicwall_sma-400.json
index e646c9f8ad..243e3a99e7 100644
--- a/tests/data/sonicwall_sma-400.json
+++ b/tests/data/sonicwall_sma-400.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 3336,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 3871,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 4161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 4427,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 4441,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 4453,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 4533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 4535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 4574,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 4579,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 4589,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 4603,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 4611,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 4617,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 4623,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 4625,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 4627,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 4628,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 4629,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 4631,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 4633,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 4634,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 4635,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 4636,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 4639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 4640,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 4641,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 4642,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "device 8086",
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "device 8086",
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "device 8086",
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "device 8086",
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 3336,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 3871,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 4161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 4427,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 4441,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 4453,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 4533,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 4535,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 4574,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 4579,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 4589,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 4603,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 4611,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 4617,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 4623,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 4625,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 4627,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 4628,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 4629,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 4631,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 4633,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 4634,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 4635,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 4636,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 4639,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 4640,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 4641,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 4642,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/sslvis.json b/tests/data/sslvis.json
index 43283650a2..674d5d574b 100644
--- a/tests/data/sslvis.json
+++ b/tests/data/sslvis.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 1531428,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 8329278,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 1439,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 9859347,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 19727720,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 19727780,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/stoneos.json b/tests/data/stoneos.json
index 6dde065b62..8645e48a01 100644
--- a/tests/data/stoneos.json
+++ b/tests/data/stoneos.json
@@ -93,9 +93,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -185,9 +187,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -200,9 +200,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -292,9 +294,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -307,9 +307,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -399,9 +401,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -414,9 +414,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -506,9 +508,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -521,9 +521,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -613,9 +615,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -628,9 +628,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -720,9 +722,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -735,9 +735,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -827,9 +829,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -842,9 +842,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -934,9 +936,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -949,9 +949,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1041,9 +1043,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1056,9 +1056,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1148,9 +1150,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1163,9 +1163,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1255,9 +1257,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1270,9 +1270,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1362,9 +1364,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1377,9 +1377,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1469,9 +1471,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1484,9 +1484,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1576,9 +1578,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1591,9 +1591,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1683,9 +1685,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1698,9 +1698,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1790,9 +1792,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1805,9 +1805,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1897,9 +1899,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1912,9 +1912,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2004,9 +2006,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2023,9 +2023,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2115,9 +2117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2130,9 +2130,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2222,9 +2224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2237,9 +2237,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2329,9 +2331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2344,9 +2344,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2436,9 +2438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2451,9 +2451,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2543,9 +2545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2558,9 +2558,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2650,9 +2652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2665,9 +2665,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2757,9 +2759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2772,9 +2772,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2864,9 +2866,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2879,9 +2879,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2971,9 +2973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2986,9 +2986,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3078,9 +3080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3093,9 +3093,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3185,9 +3187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3200,9 +3200,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3292,9 +3294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3307,9 +3307,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3399,9 +3401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3414,9 +3414,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3506,9 +3508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3521,9 +3521,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3613,9 +3615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3628,9 +3628,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3720,9 +3722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3735,9 +3735,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3827,9 +3829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3842,9 +3842,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3934,9 +3936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/transition.json b/tests/data/transition.json
index e450110dea..6c3199271c 100644
--- a/tests/data/transition.json
+++ b/tests/data/transition.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 50001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 50006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 50025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 50026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 50053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 50255,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 50302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 50666,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 52850,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 53018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 60001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 60026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 70001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 13,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 2075436,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 50001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 50006,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 50025,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 50026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 50053,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 50255,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 50302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 50666,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 52850,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 53018,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 60001,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 60026,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 70001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/trendnet.json b/tests/data/trendnet.json
index b4cc39c9fe..133ffbf59c 100644
--- a/tests/data/trendnet.json
+++ b/tests/data/trendnet.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -911,9 +911,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1003,9 +1005,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1018,9 +1018,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1110,9 +1112,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1125,9 +1125,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1217,9 +1219,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1232,9 +1232,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1324,9 +1326,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1339,9 +1339,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1431,9 +1433,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1446,9 +1446,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1538,9 +1540,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1553,9 +1553,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 0,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -1645,9 +1647,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1660,9 +1660,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1752,9 +1754,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/truenas.json b/tests/data/truenas.json
index 58862ee7cf..a96b7ed227 100644
--- a/tests/data/truenas.json
+++ b/tests/data/truenas.json
@@ -2516,7 +2516,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": 0.29955942419893233,
+                    "sensor_current": 0.29955942419893,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -2863,7 +2863,486 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.4.6.0",
+                    "sensor_index": "zfsArcC.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "ARC C",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 40770786,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.4.3.0",
+                    "sensor_index": "zfsArcData.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "ARC Data",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 36451872,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
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+                    "sensor_index": "zpoolHealth.2",
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+                    "state_descr": "online",
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+                    "state_descr": "degraded",
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+                    "state_value": 1,
+                    "state_generic_value": 1
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+                {
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+                    "state_descr": "faulted",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "offline",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "unavail",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "removed",
+                    "state_draw_graph": 1,
+                    "state_value": 5,
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     },
     "storage": {
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diff --git a/tests/data/truenas_11-3.json b/tests/data/truenas_11-3.json
index 5247030715..e3832c3f5c 100644
--- a/tests/data/truenas_11-3.json
+++ b/tests/data/truenas_11-3.json
@@ -776,7 +776,7 @@
                     "group": null,
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": 14.574531946696837,
+                    "sensor_current": 14.574531946697,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -1099,7 +1099,462 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
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+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.5.1.0",
+                    "sensor_index": "zfsL2ArcHits.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "L2ARC Hits",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.5.2.0",
+                    "sensor_index": "zfsL2ArcMisses.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "L2ARC Misses",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.5.3.0",
+                    "sensor_index": "zfsL2ArcRead.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "L2ARC Reads",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.5.5.0",
+                    "sensor_index": "zfsL2ArcSize.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "L2ARC Size",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.5.4.0",
+                    "sensor_index": "zfsL2ArcWrite.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "L2ARC Writes",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.6.3.0",
+                    "sensor_index": "zfsZilstatOps10sec.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "ZIL Operations last 10 seconds",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.6.1.0",
+                    "sensor_index": "zfsZilstatOps1sec.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "ZIL Operations last second",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "count",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.6.2.0",
+                    "sensor_index": "zfsZilstatOps5sec.0",
+                    "sensor_type": "truenas",
+                    "sensor_descr": "ZIL Operations last 5 seconds",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.50536.1.1.1.1.7.1",
+                    "sensor_index": "zpoolHealth.1",
+                    "sensor_type": "zpoolTable",
+                    "sensor_descr": "ZPool: freenas-boot",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "zpoolTable"
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "online",
+                    "state_draw_graph": 1,
+                    "state_value": 0,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "degraded",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 1
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "faulted",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "offline",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "unavail",
+                    "state_draw_graph": 1,
+                    "state_value": 4,
+                    "state_generic_value": 2
+                },
+                {
+                    "state_name": "zpoolTable",
+                    "state_descr": "removed",
+                    "state_draw_graph": 1,
+                    "state_value": 5,
+                    "state_generic_value": 2
+                }
+            ]
+        }
     },
     "storage": {
         "discovery": {
diff --git a/tests/data/ubiquoss-pon_9500.json b/tests/data/ubiquoss-pon_9500.json
index a83b355f7f..d49b63aca2 100644
--- a/tests/data/ubiquoss-pon_9500.json
+++ b/tests/data/ubiquoss-pon_9500.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifOperStatus": "up",
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@@ -5172,9 +5174,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5187,9 +5187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -5279,9 +5281,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5294,9 +5294,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -5386,9 +5388,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -5401,9 +5401,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5493,9 +5495,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5508,9 +5508,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5600,9 +5602,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5615,9 +5615,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5707,9 +5709,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5722,9 +5722,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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@@ -5814,9 +5816,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5829,9 +5829,11 @@
                     "portName": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -5921,9 +5923,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -5936,9 +5936,11 @@
                     "portName": null,
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@@ -6028,9 +6030,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6043,9 +6043,11 @@
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                     "ifOperStatus": "up",
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@@ -6135,9 +6137,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -6150,9 +6150,11 @@
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@@ -6242,9 +6244,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6257,9 +6257,11 @@
                     "portName": null,
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                     "ifOperStatus": "up",
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@@ -6349,9 +6351,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6364,9 +6364,11 @@
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@@ -6456,9 +6458,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6471,9 +6471,11 @@
                     "portName": null,
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@@ -6563,9 +6565,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6578,9 +6578,11 @@
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@@ -6670,9 +6672,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6685,9 +6685,11 @@
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@@ -6777,9 +6779,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6792,9 +6792,11 @@
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@@ -6884,9 +6886,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6899,9 +6899,11 @@
                     "portName": null,
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@@ -6991,9 +6993,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7006,9 +7006,11 @@
                     "portName": null,
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@@ -7098,9 +7100,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7113,9 +7113,11 @@
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@@ -7205,9 +7207,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7220,9 +7220,11 @@
                     "portName": null,
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@@ -7312,9 +7314,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -7327,9 +7327,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -7419,9 +7421,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -7530,9 +7532,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
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@@ -7545,9 +7545,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7637,9 +7639,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7652,9 +7652,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7744,9 +7746,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
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@@ -7759,9 +7759,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -7851,9 +7853,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7866,9 +7866,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8172,9 +8174,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
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@@ -9150,9 +9150,11 @@
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@@ -9257,9 +9257,11 @@
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@@ -9364,9 +9364,11 @@
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@@ -9471,9 +9471,11 @@
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@@ -9578,9 +9578,11 @@
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@@ -9685,9 +9685,11 @@
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                 {
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@@ -9792,9 +9792,11 @@
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                 {
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@@ -9899,9 +9899,11 @@
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@@ -10006,9 +10006,11 @@
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@@ -10113,9 +10113,11 @@
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@@ -10220,9 +10220,11 @@
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@@ -10312,9 +10314,7 @@
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@@ -10327,9 +10327,11 @@
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@@ -10419,9 +10421,7 @@
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@@ -10434,9 +10434,11 @@
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@@ -10526,9 +10528,7 @@
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                 {
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@@ -10541,9 +10541,11 @@
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@@ -10633,9 +10635,7 @@
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                 {
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@@ -10648,9 +10648,11 @@
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@@ -10740,9 +10742,7 @@
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@@ -10755,9 +10755,11 @@
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@@ -10847,9 +10849,7 @@
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@@ -10862,9 +10862,11 @@
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@@ -10954,9 +10956,7 @@
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                 {
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@@ -10969,9 +10969,11 @@
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@@ -11061,9 +11063,7 @@
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                 {
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@@ -11076,9 +11076,11 @@
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@@ -11168,9 +11170,7 @@
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                 {
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@@ -11183,9 +11183,11 @@
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                     "ifSpeed": 10000000000,
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@@ -11275,9 +11277,7 @@
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                 {
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@@ -11290,9 +11290,11 @@
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 30941138693,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -11825,9 +11825,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12238,9 +12240,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 64341610398,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 701,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 7163407,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 702,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 591436321953,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 2001,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 10004,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 10015,
                     "ifSpeed": 8000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 8000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/valere.json b/tests/data/valere.json
index 1f17d11529..063aaebec8 100644
--- a/tests/data/valere.json
+++ b/tests/data/valere.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/vigintos.json b/tests/data/vigintos.json
index fcf2fb7bf5..f9556fce5f 100644
--- a/tests/data/vigintos.json
+++ b/tests/data/vigintos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/vivotek.json b/tests/data/vivotek.json
index 8ace9c8e2a..3eeeef6899 100644
--- a/tests/data/vivotek.json
+++ b/tests/data/vivotek.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -120,9 +120,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -212,9 +214,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -231,9 +231,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -323,9 +325,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -338,9 +338,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -430,9 +432,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/voss_7432cq.json b/tests/data/voss_7432cq.json
index 97cdf9bbad..2d2bb70cba 100644
--- a/tests/data/voss_7432cq.json
+++ b/tests/data/voss_7432cq.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 332,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 333,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 337,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 2669637,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 3400452,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 2885635,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 3733461,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 4691073,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 4703651,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 332,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 3391556,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 333,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 3385875,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 337,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 3939297,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/voss_8404c.json b/tests/data/voss_8404c.json
index 81b5bd2652..5696738e25 100644
--- a/tests/data/voss_8404c.json
+++ b/tests/data/voss_8404c.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 2049,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 2068,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 2073,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 2098,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 2099,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 2100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 2118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 2123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 2149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 2218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 2219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 2220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 2221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 2222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 2223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 2224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 2225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 2228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 2258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 2288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
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@@ -6792,9 +6792,11 @@
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                     "ifSpeed": null,
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@@ -6884,9 +6886,7 @@
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-                    "ifHighSpeed_prev": null
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@@ -6899,9 +6899,11 @@
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@@ -6991,9 +6993,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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@@ -7006,9 +7006,11 @@
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@@ -7098,9 +7100,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7113,9 +7113,11 @@
                     "portName": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7220,9 +7220,11 @@
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@@ -7312,9 +7314,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7327,9 +7327,11 @@
                     "portName": null,
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@@ -7419,9 +7421,7 @@
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-                    "ifHighSpeed_prev": null
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                 }
             ]
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@@ -7438,9 +7438,11 @@
                     "portName": null,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 0,
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                     "ifOperStatus": "down",
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@@ -7530,9 +7532,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7545,9 +7545,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -7637,9 +7639,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7652,9 +7652,11 @@
                     "portName": null,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
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@@ -7744,9 +7746,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -7759,9 +7759,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -7851,9 +7853,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7866,9 +7866,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifOperStatus": "up",
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@@ -7958,9 +7960,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7973,9 +7973,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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@@ -8065,9 +8067,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8080,9 +8080,11 @@
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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@@ -8172,9 +8174,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8187,9 +8187,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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@@ -8279,9 +8281,7 @@
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-                    "ifHighSpeed_prev": null
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                 {
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@@ -8294,9 +8294,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -8386,9 +8388,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8401,9 +8401,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8493,9 +8495,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8508,9 +8508,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -8600,9 +8602,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8615,9 +8615,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -8707,9 +8709,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -8722,9 +8722,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -8814,9 +8816,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8829,9 +8829,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8921,9 +8923,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8936,9 +8936,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -9028,9 +9030,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -9043,9 +9043,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
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                     "ifOperStatus": "up",
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@@ -9135,9 +9137,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -9150,9 +9150,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9242,9 +9244,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9257,9 +9257,11 @@
                     "portName": null,
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                     "ifSpeed": 40000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 40000,
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                     "ifOperStatus": "up",
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@@ -9349,9 +9351,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 },
                 {
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@@ -9364,9 +9364,11 @@
                     "portName": null,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 0,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9456,9 +9458,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -9471,9 +9471,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -9563,9 +9565,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -9578,9 +9578,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9670,9 +9672,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 12456191,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 2928249,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 3153674,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 7539875,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 8324859,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 8166693,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 8009521,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 8582656,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 9397850,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 9591903,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 9438059,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 9723448,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 9768289,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 54385760,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 12348359,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 12423136,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 12560207,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 2049,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 2068,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 2073,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 2098,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 2099,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 2100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 2118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 2123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 2149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 2218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 2219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 2220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 2221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 2222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 2223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 2224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 2225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 2228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 2258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 2288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 2304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 2305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 3152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 6092,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 6099,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 6100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/voss_8608.json b/tests/data/voss_8608.json
index dbc2df61da..7f2fc423de 100644
--- a/tests/data/voss_8608.json
+++ b/tests/data/voss_8608.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 325,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 326,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 327,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 329,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 331,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 332,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 333,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 334,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 335,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 336,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 337,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 338,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 339,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 340,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 341,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 342,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 343,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 386,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 387,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 388,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 393,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 394,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 87862103,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": 40000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 40000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 87835084,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 39515092,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 171449890,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 48438,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 280704637,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 695108,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 111607118,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 34322902,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 325,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 107483154,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 326,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 327,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 329,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 331,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 332,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 333,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 334,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 335,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 336,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 337,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 338,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 339,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 340,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 202418613,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 341,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 33328992,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 342,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 169461636,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 343,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 40710272,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 384,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 972668,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 385,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 58951698,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 386,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 974317,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 387,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 42038773,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13965,9 +13965,11 @@
                     "portName": null,
                     "ifIndex": 388,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14057,9 +14059,7 @@
                     "ifOutMulticastPkts": 66021787,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14072,9 +14072,11 @@
                     "portName": null,
                     "ifIndex": 389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14164,9 +14166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14179,9 +14179,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14271,9 +14273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14286,9 +14286,11 @@
                     "portName": null,
                     "ifIndex": 391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14378,9 +14380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14393,9 +14393,11 @@
                     "portName": null,
                     "ifIndex": 392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14485,9 +14487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14500,9 +14500,11 @@
                     "portName": null,
                     "ifIndex": 393,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14592,9 +14594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14607,9 +14607,11 @@
                     "portName": null,
                     "ifIndex": 394,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14699,9 +14701,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14714,9 +14714,11 @@
                     "portName": null,
                     "ifIndex": 395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14806,9 +14808,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14821,9 +14821,11 @@
                     "portName": null,
                     "ifIndex": 396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -14913,9 +14915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14928,9 +14928,11 @@
                     "portName": null,
                     "ifIndex": 397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15020,9 +15022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15035,9 +15035,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15127,9 +15129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15142,9 +15142,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15234,9 +15236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15249,9 +15249,11 @@
                     "portName": null,
                     "ifIndex": 400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15341,9 +15343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15356,9 +15356,11 @@
                     "portName": null,
                     "ifIndex": 401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15448,9 +15450,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15463,9 +15463,11 @@
                     "portName": null,
                     "ifIndex": 402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15555,9 +15557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15570,9 +15570,11 @@
                     "portName": null,
                     "ifIndex": 403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15662,9 +15664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15677,9 +15677,11 @@
                     "portName": null,
                     "ifIndex": 404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15769,9 +15771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15784,9 +15784,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15876,9 +15878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15891,9 +15891,11 @@
                     "portName": null,
                     "ifIndex": 406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -15983,9 +15985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15998,9 +15998,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16090,9 +16092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16105,9 +16105,11 @@
                     "portName": null,
                     "ifIndex": 512,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16197,9 +16199,7 @@
                     "ifOutMulticastPkts": 45337851,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16212,9 +16212,11 @@
                     "portName": null,
                     "ifIndex": 516,
                     "ifSpeed": 100000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16304,9 +16306,7 @@
                     "ifOutMulticastPkts": 180765468,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16319,9 +16319,11 @@
                     "portName": null,
                     "ifIndex": 520,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16411,9 +16413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16426,9 +16426,11 @@
                     "portName": null,
                     "ifIndex": 524,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16518,9 +16520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16533,9 +16533,11 @@
                     "portName": null,
                     "ifIndex": 528,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16625,9 +16627,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16640,9 +16640,11 @@
                     "portName": null,
                     "ifIndex": 532,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -16732,9 +16734,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/voss_9012.json b/tests/data/voss_9012.json
index a35241afd0..f27b129405 100644
--- a/tests/data/voss_9012.json
+++ b/tests/data/voss_9012.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 384,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 385,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 386,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 387,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 388,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 392,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 393,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 394,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 395,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 396,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -5279,9 +5281,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 84981545838,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 2545020604,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 20370626609,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 26870710408,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 187048412767,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
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@@ -6781,9 +6783,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6796,9 +6796,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6888,9 +6890,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -6903,9 +6903,11 @@
                     "portName": null,
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                     "ifConnectorPresent": "true",
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6995,9 +6997,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7010,9 +7010,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
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                     "ifOperStatus": "down",
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@@ -7102,9 +7104,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7117,9 +7117,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7224,9 +7224,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7331,9 +7331,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7438,9 +7438,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -7545,9 +7545,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7652,9 +7652,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 0,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7759,9 +7759,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
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                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7866,9 +7866,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7973,9 +7973,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8080,9 +8080,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8187,9 +8187,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
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@@ -8279,9 +8281,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8294,9 +8294,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8386,9 +8388,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8493,9 +8495,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 388,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 389,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 390,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 391,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 8459452969,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 392,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9456,9 +9458,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 397,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 106497499,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 398,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 399,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 4134018141,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 400,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 10044106213,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/vrp_5720-32x-ei.json b/tests/data/vrp_5720-32x-ei.json
index 8fbe53906f..718e6878dc 100644
--- a/tests/data/vrp_5720-32x-ei.json
+++ b/tests/data/vrp_5720-32x-ei.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -5925,9 +5927,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 461665833514,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 463504738959,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 463598142347,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 146364729891,
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 23043011033,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mg3-sw",
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 351720460959,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "uplink",
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 28452231,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "multicast",
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "wifi",
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -11256,7 +11256,7 @@
                     "group": "GigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -11.079053973095196,
+                    "sensor_current": -11.079053973095,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11280,7 +11280,7 @@
                     "group": "GigabitEthernet0/0/2",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -8.794260687941502,
+                    "sensor_current": -8.7942606879415,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11304,7 +11304,7 @@
                     "group": "GigabitEthernet0/0/3",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -18.23908740944319,
+                    "sensor_current": -18.239087409443,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11328,7 +11328,7 @@
                     "group": "GigabitEthernet0/0/4",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -19.208187539523752,
+                    "sensor_current": -19.208187539524,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11376,7 +11376,7 @@
                     "group": "GigabitEthernet0/0/6",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -7.695510786217261,
+                    "sensor_current": -7.6955107862173,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11400,7 +11400,7 @@
                     "group": "GigabitEthernet0/0/7",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -9.913998282380824,
+                    "sensor_current": -9.9139982823808,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11424,7 +11424,7 @@
                     "group": "GigabitEthernet0/0/8",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -12.006594505464182,
+                    "sensor_current": -12.006594505464,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11448,7 +11448,7 @@
                     "group": "GigabitEthernet0/0/23",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.946486305533762,
+                    "sensor_current": -6.9464863055338,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11472,7 +11472,7 @@
                     "group": "XGigabitEthernet0/0/4",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -3.4008379993014977,
+                    "sensor_current": -3.4008379993015,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11496,7 +11496,7 @@
                     "group": "GigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.985994592184558,
+                    "sensor_current": -5.9859945921846,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11520,7 +11520,7 @@
                     "group": "GigabitEthernet0/0/2",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.073030467403343,
+                    "sensor_current": -6.0730304674033,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11544,7 +11544,7 @@
                     "group": "GigabitEthernet0/0/3",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.143937264016879,
+                    "sensor_current": -6.1439372640169,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11568,7 +11568,7 @@
                     "group": "GigabitEthernet0/0/4",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.126101736612705,
+                    "sensor_current": -6.1261017366127,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -11592,7 +11592,7 @@
                     "group": "GigabitEthernet0/0/5",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -5.900668766687054,
+                    "sensor_current": -5.9006687666871,
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@@ -11616,7 +11616,7 @@
                     "group": "GigabitEthernet0/0/6",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -6.234230429434881,
+                    "sensor_current": -6.2342304294349,
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@@ -11640,7 +11640,7 @@
                     "group": "GigabitEthernet0/0/7",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -7.055337738384071,
+                    "sensor_current": -7.0553377383841,
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@@ -11664,7 +11664,7 @@
                     "group": "GigabitEthernet0/0/8",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
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+                    "sensor_current": -6.2708799702989,
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@@ -11688,7 +11688,7 @@
                     "group": "GigabitEthernet0/0/23",
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                     "sensor_multiplier": 1,
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+                    "sensor_current": -6.3827216398241,
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@@ -11712,7 +11712,7 @@
                     "group": "XGigabitEthernet0/0/4",
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                     "sensor_multiplier": 1,
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                     "sensor_limit_low": null,
@@ -12319,7 +12319,1322 @@
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+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/3",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.312,
+                    "sensor_limit": 3.8088,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8152,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67436814",
+                    "sensor_index": "67436814",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/4",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.322,
+                    "sensor_limit": 3.8203,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8237,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67436878",
+                    "sensor_index": "67436878",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/5",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.318,
+                    "sensor_limit": 3.8157,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8203,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67436942",
+                    "sensor_index": "67436942",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/6",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.311,
+                    "sensor_limit": 3.80765,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.81435,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67437006",
+                    "sensor_index": "67437006",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/7",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.33,
+                    "sensor_limit": 3.8295,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8305,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67437070",
+                    "sensor_index": "67437070",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/8",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.32,
+                    "sensor_limit": 3.818,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.822,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67438030",
+                    "sensor_index": "67438030",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "GigabitEthernet0/0/23",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.318,
+                    "sensor_limit": 3.8157,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8203,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67469582",
+                    "sensor_index": "67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.314,
+                    "sensor_limit": 3.8111,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.8169,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "hwEntityFanState",
+                    "state_descr": "Normal",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hwEntityFanState",
+                    "state_descr": "Abnormal",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                }
+            ]
+        }
     },
     "vlans": {
         "discovery": {
diff --git a/tests/data/vrp_5720-vrf.json b/tests/data/vrp_5720-vrf.json
index 036831c321..57073a50c0 100644
--- a/tests/data/vrp_5720-vrf.json
+++ b/tests/data/vrp_5720-vrf.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -8810,9 +8812,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15459,9 +15459,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15551,9 +15553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15566,9 +15566,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15658,9 +15660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15765,9 +15767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15780,9 +15780,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15872,9 +15874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15887,9 +15887,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15979,9 +15981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15994,9 +15994,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16086,9 +16088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16101,9 +16101,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16193,9 +16195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16208,9 +16208,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16300,9 +16302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16315,9 +16315,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16407,9 +16409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16514,9 +16516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16529,9 +16529,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16621,9 +16623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16636,9 +16636,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16728,9 +16730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16743,9 +16743,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16835,9 +16837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16942,9 +16944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17049,9 +17051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17156,9 +17158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17263,9 +17265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17370,9 +17372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17385,9 +17385,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17477,9 +17479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -17496,9 +17496,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17588,9 +17590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17603,9 +17603,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17695,9 +17697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17710,9 +17710,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17802,9 +17804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17817,9 +17817,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -17909,9 +17911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17924,9 +17924,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18016,9 +18018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18031,9 +18031,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18123,9 +18125,7 @@
                     "ifOutMulticastPkts": 1214314,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18138,9 +18138,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18230,9 +18232,7 @@
                     "ifOutMulticastPkts": 2274777,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18245,9 +18245,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18337,9 +18339,7 @@
                     "ifOutMulticastPkts": 1258134,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18352,9 +18352,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18444,9 +18446,7 @@
                     "ifOutMulticastPkts": 1863207,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18459,9 +18459,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18551,9 +18553,7 @@
                     "ifOutMulticastPkts": 1065090,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18566,9 +18566,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18658,9 +18660,7 @@
                     "ifOutMulticastPkts": 2375671,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18673,9 +18673,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18765,9 +18767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18780,9 +18780,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -18872,9 +18874,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18887,9 +18887,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18979,9 +18981,7 @@
                     "ifOutMulticastPkts": 704018,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -18994,9 +18994,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19086,9 +19088,7 @@
                     "ifOutMulticastPkts": 1625552,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19101,9 +19101,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19193,9 +19195,7 @@
                     "ifOutMulticastPkts": 3052268,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19208,9 +19208,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19300,9 +19302,7 @@
                     "ifOutMulticastPkts": 221839,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19315,9 +19315,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19407,9 +19409,7 @@
                     "ifOutMulticastPkts": 181551,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19422,9 +19422,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19514,9 +19516,7 @@
                     "ifOutMulticastPkts": 1769484,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19529,9 +19529,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19621,9 +19623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19636,9 +19636,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -19728,9 +19730,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19743,9 +19743,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19835,9 +19837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19850,9 +19850,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -19942,9 +19944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -19957,9 +19957,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20049,9 +20051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20064,9 +20064,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20156,9 +20158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20171,9 +20171,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20263,9 +20265,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20278,9 +20278,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20370,9 +20372,7 @@
                     "ifOutMulticastPkts": 3597435,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20385,9 +20385,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20477,9 +20479,7 @@
                     "ifOutMulticastPkts": 7632998,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20492,9 +20492,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20584,9 +20586,7 @@
                     "ifOutMulticastPkts": 8519768,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20599,9 +20599,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20691,9 +20693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20706,9 +20706,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20798,9 +20800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20813,9 +20813,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -20905,9 +20907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -20920,9 +20920,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21012,9 +21014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21027,9 +21027,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21119,9 +21121,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21134,9 +21134,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21226,9 +21228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21241,9 +21241,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21333,9 +21335,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21348,9 +21348,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21440,9 +21442,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21455,9 +21455,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21547,9 +21549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21562,9 +21562,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21654,9 +21656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21669,9 +21669,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21761,9 +21763,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21776,9 +21776,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21868,9 +21870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21883,9 +21883,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21975,9 +21977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -21990,9 +21990,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22082,9 +22084,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22097,9 +22097,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22189,9 +22191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22204,9 +22204,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22296,9 +22298,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22311,9 +22311,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22403,9 +22405,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22418,9 +22418,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22510,9 +22512,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22525,9 +22525,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22617,9 +22619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22632,9 +22632,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22724,9 +22726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22739,9 +22739,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22831,9 +22833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22846,9 +22846,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22938,9 +22940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -22953,9 +22953,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23045,9 +23047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -23060,9 +23060,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23152,9 +23154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23167,9 +23167,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23259,9 +23261,7 @@
                     "ifOutMulticastPkts": 740509,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23274,9 +23274,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23366,9 +23368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23381,9 +23381,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23473,9 +23475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23488,9 +23488,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23580,9 +23582,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -23595,9 +23595,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23687,9 +23689,7 @@
                     "ifOutMulticastPkts": 718570,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -23702,9 +23702,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23794,9 +23796,7 @@
                     "ifOutMulticastPkts": 1537379,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -23809,9 +23809,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -23901,9 +23903,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -23916,9 +23916,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24008,9 +24010,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24023,9 +24023,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24115,9 +24117,7 @@
                     "ifOutMulticastPkts": 2252964,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24130,9 +24130,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24222,9 +24224,7 @@
                     "ifOutMulticastPkts": 3034237,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24237,9 +24237,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24329,9 +24331,7 @@
                     "ifOutMulticastPkts": 699087,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24344,9 +24344,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -24436,9 +24438,7 @@
                     "ifOutMulticastPkts": 927525,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24451,9 +24451,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -24543,9 +24545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24558,9 +24558,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24650,9 +24652,7 @@
                     "ifOutMulticastPkts": 1706889,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24665,9 +24665,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24757,9 +24759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24772,9 +24772,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24864,9 +24866,7 @@
                     "ifOutMulticastPkts": 1479189,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24879,9 +24879,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -24971,9 +24973,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -24986,9 +24986,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25078,9 +25080,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25093,9 +25093,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25185,9 +25187,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25200,9 +25200,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25292,9 +25294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25307,9 +25307,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25399,9 +25401,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25414,9 +25414,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25506,9 +25508,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25521,9 +25521,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25613,9 +25615,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25628,9 +25628,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25720,9 +25722,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25735,9 +25735,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25827,9 +25829,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25842,9 +25842,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -25934,9 +25936,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -25949,9 +25949,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26041,9 +26043,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26056,9 +26056,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26148,9 +26150,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26163,9 +26163,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26255,9 +26257,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26270,9 +26270,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26362,9 +26364,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26377,9 +26377,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26469,9 +26471,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26484,9 +26484,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26576,9 +26578,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26591,9 +26591,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26683,9 +26685,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26698,9 +26698,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26790,9 +26792,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26805,9 +26805,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26897,9 +26899,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -26912,9 +26912,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27004,9 +27006,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27019,9 +27019,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27111,9 +27113,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27126,9 +27126,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27218,9 +27220,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27233,9 +27233,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27325,9 +27327,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27340,9 +27340,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27432,9 +27434,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27447,9 +27447,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27539,9 +27541,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27554,9 +27554,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27646,9 +27648,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 699903,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 176,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 1127007,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 1063935,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 1364022,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 1950874,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 1828050,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "core",
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 427104,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -35110,7 +35110,7 @@
                     "group": "XGigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.2184874961635637,
+                    "sensor_current": -2.2184874961636,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35134,7 +35134,7 @@
                     "group": "XGigabitEthernet1/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.58060922270801,
+                    "sensor_current": -2.580609222708,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35158,7 +35158,7 @@
                     "group": "XGigabitEthernet2/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -3.036436112666679,
+                    "sensor_current": -3.0364361126667,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35182,7 +35182,7 @@
                     "group": "XGigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.3807216157947098,
+                    "sensor_current": -2.3807216157947,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35206,7 +35206,7 @@
                     "group": "XGigabitEthernet1/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.2112552799726046,
+                    "sensor_current": -2.2112552799726,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35230,7 +35230,7 @@
                     "group": "XGigabitEthernet2/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.3433144524098592,
+                    "sensor_current": -2.3433144524099,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -35642,7 +35642,623 @@
                 }
             ]
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.0051,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.68517966",
+                    "sensor_index": "68517966",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet1/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.005498,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.69566542",
+                    "sensor_index": "69566542",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet2/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.006082,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.67469390",
+                    "sensor_index": "rx-67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1 Rx",
+                    "group": "XGigabitEthernet0/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.2184874961636,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469390",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.2184874961636,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.68517966",
+                    "sensor_index": "rx-68517966",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet1/0/1 Rx",
+                    "group": "XGigabitEthernet1/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.580609222708,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "68517966",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.580609222708,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.69566542",
+                    "sensor_index": "rx-69566542",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet2/0/1 Rx",
+                    "group": "XGigabitEthernet2/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -3.0364361126667,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "69566542",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -3.0364361126667,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.67469390",
+                    "sensor_index": "tx-67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1 Tx",
+                    "group": "XGigabitEthernet0/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.3807216157947,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469390",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.3807216157947,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.68517966",
+                    "sensor_index": "tx-68517966",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet1/0/1 Tx",
+                    "group": "XGigabitEthernet1/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.2112552799726,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "68517966",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.2112552799726,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.69566542",
+                    "sensor_index": "tx-69566542",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet2/0/1 Tx",
+                    "group": "XGigabitEthernet2/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.3433144524099,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "69566542",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.3433144524099,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.20.1.3.1",
+                    "sensor_index": "1",
+                    "sensor_type": "hwMemberStackRole",
+                    "sensor_descr": "Unit 1 S5720-56C-PWR-EI-AC Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwMemberStackRole"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.20.1.3.2",
+                    "sensor_index": "2",
+                    "sensor_type": "hwMemberStackRole",
+                    "sensor_descr": "Unit 2 S5720-56C-PWR-EI-AC Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 2,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwMemberStackRole"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.21.1.5.1.0",
+                    "sensor_index": "1.0",
+                    "sensor_type": "hwStackPortStatus",
+                    "sensor_descr": "Unit 1 stack-port 0 Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwStackPortStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.21.1.5.1.1",
+                    "sensor_index": "1.1",
+                    "sensor_type": "hwStackPortStatus",
+                    "sensor_descr": "Unit 1 stack-port 1 Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwStackPortStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.21.1.5.2.0",
+                    "sensor_index": "2.0",
+                    "sensor_type": "hwStackPortStatus",
+                    "sensor_descr": "Unit 2 stack-port 0 Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwStackPortStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "state",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.183.1.21.1.5.2.1",
+                    "sensor_index": "2.1",
+                    "sensor_type": "hwStackPortStatus",
+                    "sensor_descr": "Unit 2 stack-port 1 Status",
+                    "group": "Stack",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 1,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": "hwStackPortStatus"
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11.67108873",
+                    "sensor_index": "67108873",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "MPU Board 0",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 44,
+                    "sensor_limit": 64,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 34,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 37,
+                    "sensor_limit": 57,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 27,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11.68157449",
+                    "sensor_index": "68157449",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "MPU Board 1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 44,
+                    "sensor_limit": 64,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 34,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.68517966",
+                    "sensor_index": "68517966",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet1/0/1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 40,
+                    "sensor_limit": 60,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 30,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11.69206025",
+                    "sensor_index": "69206025",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "MPU Board 2",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 43,
+                    "sensor_limit": 63,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 33,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.69566542",
+                    "sensor_index": "69566542",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet2/0/1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 41,
+                    "sensor_limit": 61,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 31,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.309,
+                    "sensor_limit": 3.80535,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.81265,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.68517966",
+                    "sensor_index": "68517966",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet1/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.265,
+                    "sensor_limit": 3.75475,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.77525,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.69566542",
+                    "sensor_index": "69566542",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet2/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.288,
+                    "sensor_limit": 3.7812,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.7948,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": [
+                {
+                    "state_name": "hwMemberStackRole",
+                    "state_descr": "Master",
+                    "state_draw_graph": 1,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hwMemberStackRole",
+                    "state_descr": "Standby",
+                    "state_draw_graph": 1,
+                    "state_value": 2,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hwMemberStackRole",
+                    "state_descr": "Slave",
+                    "state_draw_graph": 1,
+                    "state_value": 3,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hwStackPortStatus",
+                    "state_descr": "Up",
+                    "state_draw_graph": 0,
+                    "state_value": 1,
+                    "state_generic_value": 0
+                },
+                {
+                    "state_name": "hwStackPortStatus",
+                    "state_descr": "Down",
+                    "state_draw_graph": 0,
+                    "state_value": 2,
+                    "state_generic_value": 2
+                }
+            ]
+        }
     },
     "bgp-peers": {
         "discovery": {
diff --git a/tests/data/vrp_5720.json b/tests/data/vrp_5720.json
index 51073dfc1d..b94198b8ba 100644
--- a/tests/data/vrp_5720.json
+++ b/tests/data/vrp_5720.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7117,9 +7117,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7209,9 +7211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7224,9 +7224,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7316,9 +7318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7331,9 +7331,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -7423,9 +7425,7 @@
                     "ifOutMulticastPkts": 9380,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7438,9 +7438,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7530,9 +7532,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7545,9 +7545,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7637,9 +7639,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7652,9 +7652,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7744,9 +7746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7759,9 +7759,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7851,9 +7853,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7866,9 +7866,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7958,9 +7960,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7973,9 +7973,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8065,9 +8067,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8080,9 +8080,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8172,9 +8174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8187,9 +8187,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8279,9 +8281,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8294,9 +8294,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8386,9 +8388,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8401,9 +8401,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8493,9 +8495,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8508,9 +8508,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8600,9 +8602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8615,9 +8615,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8707,9 +8709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8722,9 +8722,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8814,9 +8816,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8829,9 +8829,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -8921,9 +8923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8936,9 +8936,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -9028,9 +9030,7 @@
                     "ifOutMulticastPkts": 96988,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9043,9 +9043,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9135,9 +9137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9150,9 +9150,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9242,9 +9244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9257,9 +9257,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9349,9 +9351,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9364,9 +9364,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9456,9 +9458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9471,9 +9471,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9563,9 +9565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9578,9 +9578,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9670,9 +9672,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9685,9 +9685,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9777,9 +9779,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9792,9 +9792,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9884,9 +9886,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9899,9 +9899,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -9991,9 +9993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10006,9 +10006,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10098,9 +10100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10113,9 +10113,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10205,9 +10207,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10220,9 +10220,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10312,9 +10314,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10327,9 +10327,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10419,9 +10421,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10434,9 +10434,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10526,9 +10528,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10541,9 +10541,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10633,9 +10635,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10648,9 +10648,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10740,9 +10742,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10755,9 +10755,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10847,9 +10849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10862,9 +10862,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -10954,9 +10956,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10969,9 +10969,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11061,9 +11063,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11076,9 +11076,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11168,9 +11170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11183,9 +11183,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11275,9 +11277,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11290,9 +11290,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11382,9 +11384,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11397,9 +11397,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11489,9 +11491,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11504,9 +11504,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11596,9 +11598,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11611,9 +11611,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11703,9 +11705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11718,9 +11718,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11810,9 +11812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11825,9 +11825,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -11917,9 +11919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11932,9 +11932,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12024,9 +12026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12039,9 +12039,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12131,9 +12133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12146,9 +12146,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12238,9 +12240,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12253,9 +12253,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12345,9 +12347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12360,9 +12360,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12452,9 +12454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12467,9 +12467,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12559,9 +12561,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12574,9 +12574,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12666,9 +12668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12681,9 +12681,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12773,9 +12775,7 @@
                     "ifOutMulticastPkts": 93493,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12788,9 +12788,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -12880,9 +12882,7 @@
                     "ifOutMulticastPkts": 96367,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12895,9 +12895,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -12987,9 +12989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13002,9 +13002,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13094,9 +13096,7 @@
                     "ifOutMulticastPkts": 23464,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13109,9 +13109,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13201,9 +13203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13216,9 +13216,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13308,9 +13310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13323,9 +13323,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13415,9 +13417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13430,9 +13430,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13522,9 +13524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13537,9 +13537,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13629,9 +13631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13644,9 +13644,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13736,9 +13738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13751,9 +13751,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -13843,9 +13845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13858,9 +13858,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13950,9 +13952,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
@@ -14084,7 +14084,7 @@
                     "group": "XGigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.7083521030722997,
+                    "sensor_current": -2.7083521030723,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14108,7 +14108,7 @@
                     "group": "XGigabitEthernet0/0/2",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.189630613788682,
+                    "sensor_current": -2.1896306137887,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14132,7 +14132,7 @@
                     "group": "XGigabitEthernet0/0/4",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.4033215531036953,
+                    "sensor_current": -2.4033215531037,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14156,7 +14156,7 @@
                     "group": "XGigabitEthernet0/0/1",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.2841251911874463,
+                    "sensor_current": -2.2841251911874,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14180,7 +14180,7 @@
                     "group": "XGigabitEthernet0/0/2",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.291479883578558,
+                    "sensor_current": -2.2914798835786,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14204,7 +14204,7 @@
                     "group": "XGigabitEthernet0/0/4",
                     "sensor_divisor": 1,
                     "sensor_multiplier": 1,
-                    "sensor_current": -2.2040350874217545,
+                    "sensor_current": -2.2040350874218,
                     "sensor_limit": null,
                     "sensor_limit_warn": null,
                     "sensor_limit_low": null,
@@ -14388,7 +14388,395 @@
             ],
             "state_indexes": []
         },
-        "poller": "matches discovery"
+        "poller": {
+            "sensors": [
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.005232,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.67469454",
+                    "sensor_index": "67469454",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/2",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.00629,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "current",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.7.67469582",
+                    "sensor_index": "67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4",
+                    "group": null,
+                    "sensor_divisor": 1000000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 0.005796,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.67469390",
+                    "sensor_index": "rx-67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1 Rx",
+                    "group": "XGigabitEthernet0/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.7083521030723,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469390",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.7083521030723,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.67469454",
+                    "sensor_index": "rx-67469454",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/2 Rx",
+                    "group": "XGigabitEthernet0/0/2",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.1896306137887,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469454",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.1896306137887,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8.67469582",
+                    "sensor_index": "rx-67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4 Rx",
+                    "group": "XGigabitEthernet0/0/4",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.4033215531037,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469582",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.4033215531037,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.67469390",
+                    "sensor_index": "tx-67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1 Tx",
+                    "group": "XGigabitEthernet0/0/1",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.2841251911874,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469390",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.2841251911874,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.67469454",
+                    "sensor_index": "tx-67469454",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/2 Tx",
+                    "group": "XGigabitEthernet0/0/2",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.2914798835786,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469454",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.2914798835786,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "dbm",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9.67469582",
+                    "sensor_index": "tx-67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4 Tx",
+                    "group": "XGigabitEthernet0/0/4",
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": -2.2040350874218,
+                    "sensor_limit": null,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": null,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": "67469582",
+                    "entPhysicalIndex_measured": "ports",
+                    "sensor_prev": -2.2040350874218,
+                    "user_func": "uw_to_dbm",
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11.67108873",
+                    "sensor_index": "67108873",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "MPU Board 0",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 42,
+                    "sensor_limit": 62,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 32,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 39,
+                    "sensor_limit": 59,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 29,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.67469454",
+                    "sensor_index": "67469454",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/2",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 41,
+                    "sensor_limit": 61,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 31,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "temperature",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.5.67469582",
+                    "sensor_index": "67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4",
+                    "group": null,
+                    "sensor_divisor": 1,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 40,
+                    "sensor_limit": 60,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 30,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67469390",
+                    "sensor_index": "67469390",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/1",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.299,
+                    "sensor_limit": 3.79385,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.80415,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67469454",
+                    "sensor_index": "67469454",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/2",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.285,
+                    "sensor_limit": 3.77775,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.79225,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                },
+                {
+                    "sensor_deleted": 0,
+                    "sensor_class": "voltage",
+                    "poller_type": "snmp",
+                    "sensor_oid": ".1.3.6.1.4.1.2011.5.25.31.1.1.3.1.6.67469582",
+                    "sensor_index": "67469582",
+                    "sensor_type": "vrp",
+                    "sensor_descr": "XGigabitEthernet0/0/4",
+                    "group": null,
+                    "sensor_divisor": 1000,
+                    "sensor_multiplier": 1,
+                    "sensor_current": 3.284,
+                    "sensor_limit": 3.7766,
+                    "sensor_limit_warn": null,
+                    "sensor_limit_low": 2.7914,
+                    "sensor_limit_low_warn": null,
+                    "sensor_alert": 1,
+                    "sensor_custom": "No",
+                    "entPhysicalIndex": null,
+                    "entPhysicalIndex_measured": null,
+                    "sensor_prev": null,
+                    "user_func": null,
+                    "state_name": null
+                }
+            ],
+            "state_indexes": []
+        }
     },
     "bgp-peers": {
         "discovery": {
diff --git a/tests/data/vrp_ac6605-26.json b/tests/data/vrp_ac6605-26.json
index 6efacd418e..41964a8836 100644
--- a/tests/data/vrp_ac6605-26.json
+++ b/tests/data/vrp_ac6605-26.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 4569672,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4549,9 +4549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4641,9 +4643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4656,9 +4656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4748,9 +4750,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4763,9 +4763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4855,9 +4857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4870,9 +4870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -4962,9 +4964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4977,9 +4977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5069,9 +5071,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5084,9 +5084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5176,9 +5178,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5191,9 +5191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5283,9 +5285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5298,9 +5298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5390,9 +5392,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5405,9 +5405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5497,9 +5499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5512,9 +5512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5604,9 +5606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5619,9 +5619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5711,9 +5713,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5726,9 +5726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5818,9 +5820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5833,9 +5833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -5925,9 +5927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5940,9 +5940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6032,9 +6034,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6047,9 +6047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6139,9 +6141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6154,9 +6154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6246,9 +6248,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6261,9 +6261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6353,9 +6355,7 @@
                     "ifOutMulticastPkts": 20421,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6368,9 +6368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6460,9 +6462,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6475,9 +6475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6567,9 +6569,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6582,9 +6582,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -6674,9 +6676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6689,9 +6689,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6781,9 +6783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6796,9 +6796,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6888,9 +6890,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6903,9 +6903,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -6995,9 +6997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7010,9 +7010,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -7102,9 +7104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/vrp_nac.json b/tests/data/vrp_nac.json
index 39721d1c3b..28bdd6edb5 100644
--- a/tests/data/vrp_nac.json
+++ b/tests/data/vrp_nac.json
@@ -13,9 +13,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -105,9 +107,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -120,9 +120,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -212,9 +214,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -227,9 +227,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -319,9 +321,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -334,9 +334,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -426,9 +428,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -441,9 +441,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -533,9 +535,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -548,9 +548,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -640,9 +642,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -655,9 +655,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -747,9 +749,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -762,9 +762,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -854,9 +856,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -869,9 +869,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -961,9 +963,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -976,9 +976,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1068,9 +1070,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1083,9 +1083,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1175,9 +1177,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1190,9 +1190,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1282,9 +1284,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1297,9 +1297,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1389,9 +1391,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1404,9 +1404,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1496,9 +1498,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1511,9 +1511,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1603,9 +1605,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1618,9 +1618,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1710,9 +1712,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1725,9 +1725,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1817,9 +1819,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1832,9 +1832,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1924,9 +1926,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1939,9 +1939,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2031,9 +2033,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2046,9 +2046,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2138,9 +2140,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2153,9 +2153,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2245,9 +2247,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2260,9 +2260,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2352,9 +2354,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2367,9 +2367,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2459,9 +2461,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2474,9 +2474,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2566,9 +2568,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2581,9 +2581,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2673,9 +2675,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2688,9 +2688,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2780,9 +2782,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2795,9 +2795,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2887,9 +2889,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2902,9 +2902,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2994,9 +2996,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3009,9 +3009,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3101,9 +3103,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3116,9 +3116,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3208,9 +3210,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3223,9 +3223,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3315,9 +3317,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3330,9 +3330,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3422,9 +3424,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3437,9 +3437,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3529,9 +3531,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3544,9 +3544,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3636,9 +3638,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3651,9 +3651,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3743,9 +3745,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3758,9 +3758,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3850,9 +3852,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3865,9 +3865,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3957,9 +3959,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3972,9 +3972,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4064,9 +4066,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4079,9 +4079,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4171,9 +4173,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4186,9 +4186,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4278,9 +4280,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4293,9 +4293,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4385,9 +4387,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4400,9 +4400,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4492,9 +4494,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4507,9 +4507,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4599,9 +4601,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4614,9 +4614,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4706,9 +4708,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4721,9 +4721,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4813,9 +4815,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4828,9 +4828,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4920,9 +4922,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4935,9 +4935,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5027,9 +5029,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5042,9 +5042,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5134,9 +5136,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5149,9 +5149,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5241,9 +5243,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5256,9 +5256,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5348,9 +5350,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5363,9 +5363,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5455,9 +5457,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5470,9 +5470,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5562,9 +5564,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5577,9 +5577,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5669,9 +5671,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5684,9 +5684,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5776,9 +5778,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5791,9 +5791,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5883,9 +5885,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5898,9 +5898,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5990,9 +5992,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6005,9 +6005,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6097,9 +6099,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6112,9 +6112,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6204,9 +6206,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6219,9 +6219,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6311,9 +6313,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6326,9 +6326,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6418,9 +6420,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6433,9 +6433,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -6525,9 +6527,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -6540,9 +6540,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6632,9 +6634,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6647,9 +6647,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -6739,9 +6741,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6754,9 +6754,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6846,9 +6848,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6861,9 +6861,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -6953,9 +6955,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6968,9 +6968,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7060,9 +7062,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7075,9 +7075,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7167,9 +7169,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7182,9 +7182,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7274,9 +7276,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7289,9 +7289,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7381,9 +7383,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7396,9 +7396,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -7488,9 +7490,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7503,9 +7503,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -7595,9 +7597,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7610,9 +7610,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7702,9 +7704,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7717,9 +7717,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7809,9 +7811,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7824,9 +7824,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7916,9 +7918,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7931,9 +7931,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8023,9 +8025,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8038,9 +8038,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8130,9 +8132,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8145,9 +8145,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8237,9 +8239,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8252,9 +8252,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8344,9 +8346,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8359,9 +8359,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8451,9 +8453,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8466,9 +8466,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8558,9 +8560,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8573,9 +8573,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8665,9 +8667,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8680,9 +8680,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8772,9 +8774,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8787,9 +8787,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -8879,9 +8881,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8894,9 +8894,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8986,9 +8988,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9001,9 +9001,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9093,9 +9095,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9108,9 +9108,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9200,9 +9202,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9215,9 +9215,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9307,9 +9309,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9322,9 +9322,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9414,9 +9416,7 @@
                     "ifOutMulticastPkts": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9429,9 +9429,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -9521,9 +9523,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9536,9 +9536,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -9628,9 +9630,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9643,9 +9643,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9735,9 +9737,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9750,9 +9750,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9842,9 +9844,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9857,9 +9857,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -9949,9 +9951,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9964,9 +9964,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -10056,9 +10058,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10071,9 +10071,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10163,9 +10165,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10178,9 +10178,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10270,9 +10272,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10285,9 +10285,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10377,9 +10379,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10392,9 +10392,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10484,9 +10486,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10499,9 +10499,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10591,9 +10593,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10606,9 +10606,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10698,9 +10700,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -10713,9 +10713,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10805,9 +10807,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10820,9 +10820,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10912,9 +10914,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10927,9 +10927,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11019,9 +11021,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11034,9 +11034,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -11126,9 +11128,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11141,9 +11141,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11233,9 +11235,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11248,9 +11248,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11340,9 +11342,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11355,9 +11355,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -11447,9 +11449,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11462,9 +11462,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11554,9 +11556,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11569,9 +11569,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11661,9 +11663,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11676,9 +11676,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11768,9 +11770,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11783,9 +11783,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11875,9 +11877,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11890,9 +11890,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11982,9 +11984,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11997,9 +11997,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -12089,9 +12091,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12104,9 +12104,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12196,9 +12198,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12211,9 +12211,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12303,9 +12305,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12318,9 +12318,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12410,9 +12412,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12425,9 +12425,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12517,9 +12519,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12532,9 +12532,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12624,9 +12626,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12639,9 +12639,11 @@
                     "portName": null,
                     "ifIndex": 171,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12731,9 +12733,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12746,9 +12746,11 @@
                     "portName": null,
                     "ifIndex": 172,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12838,9 +12840,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12853,9 +12853,11 @@
                     "portName": null,
                     "ifIndex": 173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12945,9 +12947,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12960,9 +12960,11 @@
                     "portName": null,
                     "ifIndex": 174,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13052,9 +13054,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13067,9 +13067,11 @@
                     "portName": null,
                     "ifIndex": 175,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13159,9 +13161,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13174,9 +13174,11 @@
                     "portName": null,
                     "ifIndex": 176,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13266,9 +13268,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13281,9 +13281,11 @@
                     "portName": null,
                     "ifIndex": 177,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13373,9 +13375,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13388,9 +13388,11 @@
                     "portName": null,
                     "ifIndex": 178,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13480,9 +13482,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13495,9 +13495,11 @@
                     "portName": null,
                     "ifIndex": 179,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13587,9 +13589,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13602,9 +13602,11 @@
                     "portName": null,
                     "ifIndex": 180,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13694,9 +13696,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13709,9 +13709,11 @@
                     "portName": null,
                     "ifIndex": 181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13801,9 +13803,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13816,9 +13816,11 @@
                     "portName": null,
                     "ifIndex": 182,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13908,9 +13910,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13923,9 +13923,11 @@
                     "portName": null,
                     "ifIndex": 183,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14015,9 +14017,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14030,9 +14030,11 @@
                     "portName": null,
                     "ifIndex": 184,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14122,9 +14124,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14137,9 +14137,11 @@
                     "portName": null,
                     "ifIndex": 185,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14229,9 +14231,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14244,9 +14244,11 @@
                     "portName": null,
                     "ifIndex": 186,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14336,9 +14338,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14351,9 +14351,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14443,9 +14445,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14458,9 +14458,11 @@
                     "portName": null,
                     "ifIndex": 188,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14550,9 +14552,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14565,9 +14565,11 @@
                     "portName": null,
                     "ifIndex": 189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14657,9 +14659,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14672,9 +14672,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14764,9 +14766,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14779,9 +14779,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14871,9 +14873,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14886,9 +14886,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14978,9 +14980,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14993,9 +14993,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15085,9 +15087,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15100,9 +15100,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15192,9 +15194,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15207,9 +15207,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15299,9 +15301,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15314,9 +15314,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15406,9 +15408,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15421,9 +15421,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15513,9 +15515,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15528,9 +15528,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15620,9 +15622,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15635,9 +15635,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15727,9 +15729,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15742,9 +15742,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15834,9 +15836,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15849,9 +15849,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -15941,9 +15943,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15956,9 +15956,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -16048,9 +16050,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16063,9 +16063,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -16155,9 +16157,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16170,9 +16170,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16262,9 +16264,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16277,9 +16277,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16369,9 +16371,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16384,9 +16384,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16476,9 +16478,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16491,9 +16491,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16583,9 +16585,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16598,9 +16598,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -16690,9 +16692,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16705,9 +16705,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -16797,9 +16799,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16812,9 +16812,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -16904,9 +16906,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16919,9 +16919,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17011,9 +17013,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17026,9 +17026,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17118,9 +17120,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17133,9 +17133,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17225,9 +17227,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17240,9 +17240,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17332,9 +17334,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17347,9 +17347,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -17439,9 +17441,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17454,9 +17454,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17546,9 +17548,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17561,9 +17561,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17653,9 +17655,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17668,9 +17668,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17760,9 +17762,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17775,9 +17775,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17867,9 +17869,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17882,9 +17882,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17974,9 +17976,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17989,9 +17989,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18081,9 +18083,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18096,9 +18096,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18188,9 +18190,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18203,9 +18203,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18295,9 +18297,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18310,9 +18310,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18402,9 +18404,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18417,9 +18417,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18509,9 +18511,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18524,9 +18524,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18616,9 +18618,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18631,9 +18631,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -18723,9 +18725,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18738,9 +18738,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18830,9 +18832,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18845,9 +18845,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18937,9 +18939,7 @@
                     "ifOutMulticastPkts": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -18952,9 +18952,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifOperStatus": "down",
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@@ -19044,9 +19046,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
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@@ -19059,9 +19059,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19151,9 +19153,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19166,9 +19166,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19258,9 +19260,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19273,9 +19273,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19365,9 +19367,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19380,9 +19380,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19472,9 +19474,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19487,9 +19487,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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@@ -19579,9 +19581,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19594,9 +19594,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -19686,9 +19688,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19701,9 +19701,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -19793,9 +19795,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -19808,9 +19808,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifOperStatus": "down",
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@@ -19900,9 +19902,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -19915,9 +19915,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -20007,9 +20009,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -20022,9 +20022,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "up",
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@@ -20114,9 +20116,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -20129,9 +20129,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -20221,9 +20223,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -20236,9 +20236,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "up",
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@@ -20328,9 +20330,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -20343,9 +20343,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -20435,9 +20437,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -20450,9 +20450,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -20542,9 +20544,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20557,9 +20557,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -20649,9 +20651,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20664,9 +20664,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20756,9 +20758,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20771,9 +20771,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20863,9 +20865,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20878,9 +20878,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -20970,9 +20972,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20985,9 +20985,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -21077,9 +21079,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21092,9 +21092,11 @@
                     "portName": null,
                     "ifIndex": 250,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -21184,9 +21186,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21199,9 +21199,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21291,9 +21293,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21306,9 +21306,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21398,9 +21400,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21413,9 +21413,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21505,9 +21507,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21520,9 +21520,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -21612,9 +21614,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21627,9 +21627,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -21719,9 +21721,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21734,9 +21734,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -21826,9 +21828,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21841,9 +21841,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
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                     "ifOperStatus": "down",
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@@ -21933,9 +21935,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -21948,9 +21948,11 @@
                     "portName": null,
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                     "ifSpeed": null,
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                     "ifOperStatus": "down",
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@@ -22040,9 +22042,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22055,9 +22055,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22147,9 +22149,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22162,9 +22162,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22254,9 +22256,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22269,9 +22269,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22361,9 +22363,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22376,9 +22376,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22468,9 +22470,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22483,9 +22483,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22575,9 +22577,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22590,9 +22590,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22682,9 +22684,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22697,9 +22697,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22789,9 +22791,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22804,9 +22804,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22896,9 +22898,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22911,9 +22911,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23003,9 +23005,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23018,9 +23018,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23110,9 +23112,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23125,9 +23125,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23217,9 +23219,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23232,9 +23232,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23324,9 +23326,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23339,9 +23339,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23431,9 +23433,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23446,9 +23446,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23538,9 +23540,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23553,9 +23553,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23645,9 +23647,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23660,9 +23660,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23752,9 +23754,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23767,9 +23767,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23859,9 +23861,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23874,9 +23874,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23966,9 +23968,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23981,9 +23981,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24073,9 +24075,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24088,9 +24088,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24180,9 +24182,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24195,9 +24195,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24287,9 +24289,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24302,9 +24302,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24394,9 +24396,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24409,9 +24409,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24501,9 +24503,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24516,9 +24516,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24608,9 +24610,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24623,9 +24623,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24715,9 +24717,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24730,9 +24730,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24822,9 +24824,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24837,9 +24837,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24929,9 +24931,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24944,9 +24944,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25036,9 +25038,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25051,9 +25051,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25143,9 +25145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25158,9 +25158,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25250,9 +25252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25265,9 +25265,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25357,9 +25359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25372,9 +25372,11 @@
                     "portName": null,
                     "ifIndex": 290,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -25464,9 +25466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25479,9 +25479,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -25571,9 +25573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25586,9 +25586,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -25678,9 +25680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25693,9 +25693,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25785,9 +25787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25800,9 +25800,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25892,9 +25894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25907,9 +25907,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25999,9 +26001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26014,9 +26014,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26106,9 +26108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26121,9 +26121,11 @@
                     "portName": null,
                     "ifIndex": 297,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26213,9 +26215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26228,9 +26228,11 @@
                     "portName": null,
                     "ifIndex": 298,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26320,9 +26322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26335,9 +26335,11 @@
                     "portName": null,
                     "ifIndex": 299,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26427,9 +26429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26442,9 +26442,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26534,9 +26536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26549,9 +26549,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26641,9 +26643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26656,9 +26656,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26748,9 +26750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26763,9 +26763,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26855,9 +26857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26870,9 +26870,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26962,9 +26964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26977,9 +26977,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27069,9 +27071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27084,9 +27084,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27176,9 +27178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27191,9 +27191,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27283,9 +27285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27298,9 +27298,11 @@
                     "portName": null,
                     "ifIndex": 308,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27390,9 +27392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27405,9 +27405,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27497,9 +27499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27512,9 +27512,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27604,9 +27606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27619,9 +27619,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27711,9 +27713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27726,9 +27726,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27818,9 +27820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27833,9 +27833,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27925,9 +27927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27940,9 +27940,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28032,9 +28034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28047,9 +28047,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28139,9 +28141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28154,9 +28154,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28246,9 +28248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28261,9 +28261,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28353,9 +28355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28368,9 +28368,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28460,9 +28462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28475,9 +28475,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -28567,9 +28569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -28586,9 +28586,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28678,9 +28680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28693,9 +28693,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28785,9 +28787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28800,9 +28800,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28892,9 +28894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28907,9 +28907,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -28999,9 +29001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29014,9 +29014,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29106,9 +29108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29121,9 +29121,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -29213,9 +29215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29228,9 +29228,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29320,9 +29322,7 @@
                     "ifOutMulticastPkts": 41212548,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29335,9 +29335,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29427,9 +29429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29442,9 +29442,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29534,9 +29536,7 @@
                     "ifOutMulticastPkts": 64378390,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29549,9 +29549,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29641,9 +29643,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29656,9 +29656,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29748,9 +29750,7 @@
                     "ifOutMulticastPkts": 38660729,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29763,9 +29763,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29855,9 +29857,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29870,9 +29870,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -29962,9 +29964,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -29977,9 +29977,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30069,9 +30071,7 @@
                     "ifOutMulticastPkts": 51006993,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30084,9 +30084,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30176,9 +30178,7 @@
                     "ifOutMulticastPkts": 15670102,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30191,9 +30191,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30283,9 +30285,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30298,9 +30298,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30390,9 +30392,7 @@
                     "ifOutMulticastPkts": 12260589,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30405,9 +30405,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30497,9 +30499,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30512,9 +30512,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30604,9 +30606,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30619,9 +30619,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30711,9 +30713,7 @@
                     "ifOutMulticastPkts": 33043259,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30726,9 +30726,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30818,9 +30820,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30833,9 +30833,11 @@
                     "portName": null,
                     "ifIndex": 22,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -30925,9 +30927,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -30940,9 +30940,11 @@
                     "portName": null,
                     "ifIndex": 23,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31032,9 +31034,7 @@
                     "ifOutMulticastPkts": 30305196,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31047,9 +31047,11 @@
                     "portName": null,
                     "ifIndex": 24,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31139,9 +31141,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31154,9 +31154,11 @@
                     "portName": null,
                     "ifIndex": 25,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31246,9 +31248,7 @@
                     "ifOutMulticastPkts": 61877537,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31261,9 +31261,11 @@
                     "portName": null,
                     "ifIndex": 26,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31353,9 +31355,7 @@
                     "ifOutMulticastPkts": 29297968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31368,9 +31368,11 @@
                     "portName": null,
                     "ifIndex": 27,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31460,9 +31462,7 @@
                     "ifOutMulticastPkts": 2448904,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31475,9 +31475,11 @@
                     "portName": null,
                     "ifIndex": 28,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31567,9 +31569,7 @@
                     "ifOutMulticastPkts": 41955119,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31582,9 +31582,11 @@
                     "portName": null,
                     "ifIndex": 29,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31674,9 +31676,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31689,9 +31689,11 @@
                     "portName": null,
                     "ifIndex": 30,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31781,9 +31783,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31796,9 +31796,11 @@
                     "portName": null,
                     "ifIndex": 31,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31888,9 +31890,7 @@
                     "ifOutMulticastPkts": 15454960,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -31903,9 +31903,11 @@
                     "portName": null,
                     "ifIndex": 32,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -31995,9 +31997,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32010,9 +32010,11 @@
                     "portName": null,
                     "ifIndex": 33,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32102,9 +32104,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32117,9 +32117,11 @@
                     "portName": null,
                     "ifIndex": 34,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32209,9 +32211,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32224,9 +32224,11 @@
                     "portName": null,
                     "ifIndex": 35,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32316,9 +32318,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32331,9 +32331,11 @@
                     "portName": null,
                     "ifIndex": 36,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32423,9 +32425,7 @@
                     "ifOutMulticastPkts": 56069894,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32438,9 +32438,11 @@
                     "portName": null,
                     "ifIndex": 37,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32530,9 +32532,7 @@
                     "ifOutMulticastPkts": 36925985,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32545,9 +32545,11 @@
                     "portName": null,
                     "ifIndex": 38,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32637,9 +32639,7 @@
                     "ifOutMulticastPkts": 51238791,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32652,9 +32652,11 @@
                     "portName": null,
                     "ifIndex": 39,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -32744,9 +32746,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32759,9 +32759,11 @@
                     "portName": null,
                     "ifIndex": 40,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32851,9 +32853,7 @@
                     "ifOutMulticastPkts": 15604486,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32866,9 +32866,11 @@
                     "portName": null,
                     "ifIndex": 41,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32958,9 +32960,7 @@
                     "ifOutMulticastPkts": 14770574,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -32973,9 +32973,11 @@
                     "portName": null,
                     "ifIndex": 42,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33065,9 +33067,7 @@
                     "ifOutMulticastPkts": 42858359,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33080,9 +33080,11 @@
                     "portName": null,
                     "ifIndex": 43,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33172,9 +33174,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33187,9 +33187,11 @@
                     "portName": null,
                     "ifIndex": 44,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33279,9 +33281,7 @@
                     "ifOutMulticastPkts": 49268245,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33294,9 +33294,11 @@
                     "portName": null,
                     "ifIndex": 45,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33386,9 +33388,7 @@
                     "ifOutMulticastPkts": 3655466,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33401,9 +33401,11 @@
                     "portName": null,
                     "ifIndex": 46,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33493,9 +33495,7 @@
                     "ifOutMulticastPkts": 28658783,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33508,9 +33508,11 @@
                     "portName": null,
                     "ifIndex": 47,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33600,9 +33602,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33615,9 +33615,11 @@
                     "portName": null,
                     "ifIndex": 48,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33707,9 +33709,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33722,9 +33722,11 @@
                     "portName": null,
                     "ifIndex": 49,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33814,9 +33816,7 @@
                     "ifOutMulticastPkts": 57607477,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33829,9 +33829,11 @@
                     "portName": null,
                     "ifIndex": 50,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33921,9 +33923,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -33936,9 +33936,11 @@
                     "portName": null,
                     "ifIndex": 51,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34028,9 +34030,7 @@
                     "ifOutMulticastPkts": 9931579,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34043,9 +34043,11 @@
                     "portName": null,
                     "ifIndex": 52,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34135,9 +34137,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34150,9 +34150,11 @@
                     "portName": null,
                     "ifIndex": 53,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34242,9 +34244,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34257,9 +34257,11 @@
                     "portName": null,
                     "ifIndex": 54,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34349,9 +34351,7 @@
                     "ifOutMulticastPkts": 31384723,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34364,9 +34364,11 @@
                     "portName": null,
                     "ifIndex": 55,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34456,9 +34458,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34471,9 +34471,11 @@
                     "portName": null,
                     "ifIndex": 56,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34563,9 +34565,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34578,9 +34578,11 @@
                     "portName": null,
                     "ifIndex": 57,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34670,9 +34672,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34685,9 +34685,11 @@
                     "portName": null,
                     "ifIndex": 58,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34777,9 +34779,7 @@
                     "ifOutMulticastPkts": 23912447,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34792,9 +34792,11 @@
                     "portName": null,
                     "ifIndex": 59,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34884,9 +34886,7 @@
                     "ifOutMulticastPkts": 31442968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -34899,9 +34899,11 @@
                     "portName": null,
                     "ifIndex": 60,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -34991,9 +34993,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35006,9 +35006,11 @@
                     "portName": null,
                     "ifIndex": 61,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35098,9 +35100,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35113,9 +35113,11 @@
                     "portName": null,
                     "ifIndex": 62,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35205,9 +35207,7 @@
                     "ifOutMulticastPkts": 11851907,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35220,9 +35220,11 @@
                     "portName": null,
                     "ifIndex": 63,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35312,9 +35314,7 @@
                     "ifOutMulticastPkts": 29253163,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35327,9 +35327,11 @@
                     "portName": null,
                     "ifIndex": 64,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35419,9 +35421,7 @@
                     "ifOutMulticastPkts": 50296285,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35434,9 +35434,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35526,9 +35528,7 @@
                     "ifOutMulticastPkts": 51830619,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35541,9 +35541,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35633,9 +35635,7 @@
                     "ifOutMulticastPkts": 55927439,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35648,9 +35648,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35740,9 +35742,7 @@
                     "ifOutMulticastPkts": 40171429,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35755,9 +35755,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -35847,9 +35849,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35862,9 +35862,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35954,9 +35956,7 @@
                     "ifOutMulticastPkts": 52928789,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -35969,9 +35969,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36061,9 +36063,7 @@
                     "ifOutMulticastPkts": 49793966,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36076,9 +36076,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36168,9 +36170,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36183,9 +36183,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36275,9 +36277,7 @@
                     "ifOutMulticastPkts": 39976875,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36290,9 +36290,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36382,9 +36384,7 @@
                     "ifOutMulticastPkts": 14883115,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36397,9 +36397,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36489,9 +36491,7 @@
                     "ifOutMulticastPkts": 44483090,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36504,9 +36504,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36596,9 +36598,7 @@
                     "ifOutMulticastPkts": 49517249,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36611,9 +36611,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36703,9 +36705,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36718,9 +36718,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36810,9 +36812,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36825,9 +36825,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36917,9 +36919,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -36932,9 +36932,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37024,9 +37026,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37039,9 +37039,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37131,9 +37133,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37146,9 +37146,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37238,9 +37240,7 @@
                     "ifOutMulticastPkts": 45360816,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37253,9 +37253,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37345,9 +37347,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37360,9 +37360,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37452,9 +37454,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37467,9 +37467,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37559,9 +37561,7 @@
                     "ifOutMulticastPkts": 40967208,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37574,9 +37574,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37666,9 +37668,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37681,9 +37681,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37773,9 +37775,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37788,9 +37788,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37880,9 +37882,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -37895,9 +37895,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -37987,9 +37989,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38002,9 +38002,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38094,9 +38096,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38109,9 +38109,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38201,9 +38203,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38216,9 +38216,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38308,9 +38310,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38323,9 +38323,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38415,9 +38417,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38430,9 +38430,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38522,9 +38524,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38537,9 +38537,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38629,9 +38631,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38644,9 +38644,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38736,9 +38738,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38751,9 +38751,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38843,9 +38845,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38858,9 +38858,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38950,9 +38952,7 @@
                     "ifOutMulticastPkts": 20022843,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -38965,9 +38965,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39057,9 +39059,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39072,9 +39072,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39164,9 +39166,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39179,9 +39179,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39271,9 +39273,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39286,9 +39286,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39378,9 +39380,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39393,9 +39393,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39485,9 +39487,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39500,9 +39500,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -39592,9 +39594,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39607,9 +39607,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39699,9 +39701,7 @@
                     "ifOutMulticastPkts": 51179367,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -39714,9 +39714,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39806,9 +39808,7 @@
                     "ifOutMulticastPkts": 32979125,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39821,9 +39821,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -39913,9 +39915,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39928,9 +39928,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40020,9 +40022,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40035,9 +40035,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40127,9 +40129,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40142,9 +40142,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -40234,9 +40236,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40249,9 +40249,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40341,9 +40343,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40356,9 +40356,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40448,9 +40450,7 @@
                     "ifOutMulticastPkts": 30156982,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40463,9 +40463,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40555,9 +40557,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40570,9 +40570,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40662,9 +40664,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40677,9 +40677,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40769,9 +40771,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40784,9 +40784,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40876,9 +40878,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40891,9 +40891,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -40983,9 +40985,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -40998,9 +40998,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41090,9 +41092,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41105,9 +41105,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41197,9 +41199,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41212,9 +41212,11 @@
                     "portName": null,
                     "ifIndex": 171,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -41304,9 +41306,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41319,9 +41319,11 @@
                     "portName": null,
                     "ifIndex": 172,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41411,9 +41413,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41426,9 +41426,11 @@
                     "portName": null,
                     "ifIndex": 173,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41518,9 +41520,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41533,9 +41533,11 @@
                     "portName": null,
                     "ifIndex": 174,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41625,9 +41627,7 @@
                     "ifOutMulticastPkts": 32095348,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41640,9 +41640,11 @@
                     "portName": null,
                     "ifIndex": 175,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41732,9 +41734,7 @@
                     "ifOutMulticastPkts": 32285556,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41747,9 +41747,11 @@
                     "portName": null,
                     "ifIndex": 176,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41839,9 +41841,7 @@
                     "ifOutMulticastPkts": 32433498,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41854,9 +41854,11 @@
                     "portName": null,
                     "ifIndex": 177,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41946,9 +41948,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -41961,9 +41961,11 @@
                     "portName": null,
                     "ifIndex": 178,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42053,9 +42055,7 @@
                     "ifOutMulticastPkts": 10887652,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -42068,9 +42068,11 @@
                     "portName": null,
                     "ifIndex": 179,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42160,9 +42162,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42175,9 +42175,11 @@
                     "portName": null,
                     "ifIndex": 180,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42267,9 +42269,7 @@
                     "ifOutMulticastPkts": 44184728,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42282,9 +42282,11 @@
                     "portName": null,
                     "ifIndex": 181,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42374,9 +42376,7 @@
                     "ifOutMulticastPkts": 45524842,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42389,9 +42389,11 @@
                     "portName": null,
                     "ifIndex": 182,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -42481,9 +42483,7 @@
                     "ifOutMulticastPkts": 55147957,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42496,9 +42496,11 @@
                     "portName": null,
                     "ifIndex": 183,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -42588,9 +42590,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -42603,9 +42603,11 @@
                     "portName": null,
                     "ifIndex": 184,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42695,9 +42697,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -42710,9 +42710,11 @@
                     "portName": null,
                     "ifIndex": 185,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42802,9 +42804,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -42817,9 +42817,11 @@
                     "portName": null,
                     "ifIndex": 186,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42909,9 +42911,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42924,9 +42924,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43016,9 +43018,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43031,9 +43031,11 @@
                     "portName": null,
                     "ifIndex": 188,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43123,9 +43125,7 @@
                     "ifOutMulticastPkts": 24179651,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43138,9 +43138,11 @@
                     "portName": null,
                     "ifIndex": 189,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43230,9 +43232,7 @@
                     "ifOutMulticastPkts": 64844615,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43245,9 +43245,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43337,9 +43339,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43352,9 +43352,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43444,9 +43446,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43459,9 +43459,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43551,9 +43553,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43566,9 +43566,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43658,9 +43660,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43673,9 +43673,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43765,9 +43767,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43780,9 +43780,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -43872,9 +43874,7 @@
                     "ifOutMulticastPkts": 18099490,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43887,9 +43887,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43979,9 +43981,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -43994,9 +43994,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44086,9 +44088,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44101,9 +44101,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44193,9 +44195,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44208,9 +44208,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44300,9 +44302,7 @@
                     "ifOutMulticastPkts": 24490065,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44315,9 +44315,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44407,9 +44409,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44422,9 +44422,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44514,9 +44516,7 @@
                     "ifOutMulticastPkts": 15820152,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44529,9 +44529,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44621,9 +44623,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44636,9 +44636,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -44728,9 +44730,7 @@
                     "ifOutMulticastPkts": 52704819,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44743,9 +44743,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44835,9 +44837,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44850,9 +44850,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44942,9 +44944,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -44957,9 +44957,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45049,9 +45051,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -45064,9 +45064,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45156,9 +45158,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45171,9 +45171,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45263,9 +45265,7 @@
                     "ifOutMulticastPkts": 15772977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45278,9 +45278,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45370,9 +45372,7 @@
                     "ifOutMulticastPkts": 15773115,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45385,9 +45385,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -45477,9 +45479,7 @@
                     "ifOutMulticastPkts": 15759756,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45492,9 +45492,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45584,9 +45586,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45599,9 +45599,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45691,9 +45693,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45706,9 +45706,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45798,9 +45800,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45813,9 +45813,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45905,9 +45907,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -45920,9 +45920,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46012,9 +46014,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46027,9 +46027,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46119,9 +46121,7 @@
                     "ifOutMulticastPkts": 21871972,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46134,9 +46134,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46226,9 +46228,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46241,9 +46241,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46333,9 +46335,7 @@
                     "ifOutMulticastPkts": 34463936,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46348,9 +46348,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46440,9 +46442,7 @@
                     "ifOutMulticastPkts": 76085186,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46455,9 +46455,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46547,9 +46549,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46562,9 +46562,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46654,9 +46656,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -46669,9 +46669,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -46761,9 +46763,7 @@
                     "ifOutMulticastPkts": 34249535,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -46776,9 +46776,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46868,9 +46870,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -46883,9 +46883,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46975,9 +46977,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -46990,9 +46990,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47082,9 +47084,7 @@
                     "ifOutMulticastPkts": 42537481,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -47097,9 +47097,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47189,9 +47191,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47204,9 +47204,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47296,9 +47298,7 @@
                     "ifOutMulticastPkts": 78304399,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47311,9 +47311,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47403,9 +47405,7 @@
                     "ifOutMulticastPkts": 78309211,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47418,9 +47418,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -47510,9 +47512,7 @@
                     "ifOutMulticastPkts": 13769730,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47525,9 +47525,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47617,9 +47619,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -47632,9 +47632,11 @@
                     "portName": null,
                     "ifIndex": 231,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47724,9 +47726,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47739,9 +47739,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47831,9 +47833,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -47846,9 +47846,11 @@
                     "portName": null,
                     "ifIndex": 233,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47938,9 +47940,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47953,9 +47953,11 @@
                     "portName": null,
                     "ifIndex": 234,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -48045,9 +48047,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48060,9 +48060,11 @@
                     "portName": null,
                     "ifIndex": 235,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48152,9 +48154,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48167,9 +48167,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48259,9 +48261,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48274,9 +48274,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48366,9 +48368,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48381,9 +48381,11 @@
                     "portName": null,
                     "ifIndex": 238,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48473,9 +48475,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48488,9 +48488,11 @@
                     "portName": null,
                     "ifIndex": 239,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48580,9 +48582,7 @@
                     "ifOutMulticastPkts": 36617977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48595,9 +48595,11 @@
                     "portName": null,
                     "ifIndex": 240,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48687,9 +48689,7 @@
                     "ifOutMulticastPkts": 36899070,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48702,9 +48702,11 @@
                     "portName": null,
                     "ifIndex": 241,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48794,9 +48796,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48809,9 +48809,11 @@
                     "portName": null,
                     "ifIndex": 242,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -48901,9 +48903,7 @@
                     "ifOutMulticastPkts": 33664651,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -48916,9 +48916,11 @@
                     "portName": null,
                     "ifIndex": 243,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49008,9 +49010,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49023,9 +49023,11 @@
                     "portName": null,
                     "ifIndex": 244,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49115,9 +49117,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49130,9 +49130,11 @@
                     "portName": null,
                     "ifIndex": 245,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49222,9 +49224,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49237,9 +49237,11 @@
                     "portName": null,
                     "ifIndex": 246,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49329,9 +49331,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49344,9 +49344,11 @@
                     "portName": null,
                     "ifIndex": 247,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49436,9 +49438,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49451,9 +49451,11 @@
                     "portName": null,
                     "ifIndex": 248,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49543,9 +49545,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -49558,9 +49558,11 @@
                     "portName": null,
                     "ifIndex": 249,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49650,9 +49652,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49665,9 +49665,11 @@
                     "portName": null,
                     "ifIndex": 250,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49757,9 +49759,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49772,9 +49772,11 @@
                     "portName": null,
                     "ifIndex": 251,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49864,9 +49866,7 @@
                     "ifOutMulticastPkts": 73389415,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49879,9 +49879,11 @@
                     "portName": null,
                     "ifIndex": 252,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -49971,9 +49973,7 @@
                     "ifOutMulticastPkts": 78164947,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49986,9 +49986,11 @@
                     "portName": null,
                     "ifIndex": 253,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50078,9 +50080,7 @@
                     "ifOutMulticastPkts": 77806151,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50093,9 +50093,11 @@
                     "portName": null,
                     "ifIndex": 254,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50185,9 +50187,7 @@
                     "ifOutMulticastPkts": 78134872,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50200,9 +50200,11 @@
                     "portName": null,
                     "ifIndex": 255,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50292,9 +50294,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50307,9 +50307,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50399,9 +50401,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50414,9 +50414,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50506,9 +50508,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -50521,9 +50521,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50613,9 +50615,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -50628,9 +50628,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50720,9 +50722,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50735,9 +50735,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50827,9 +50829,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50842,9 +50842,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -50934,9 +50936,7 @@
                     "ifOutMulticastPkts": 32988753,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50949,9 +50949,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51041,9 +51043,7 @@
                     "ifOutMulticastPkts": 32988476,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51056,9 +51056,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51148,9 +51150,7 @@
                     "ifOutMulticastPkts": 21618646,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51163,9 +51163,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -51255,9 +51257,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51270,9 +51270,11 @@
                     "portName": null,
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                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -51362,9 +51364,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51377,9 +51377,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -51469,9 +51471,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51484,9 +51484,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": 20000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 20000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51576,9 +51578,7 @@
                     "ifOutMulticastPkts": 53003454,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -51591,9 +51591,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51683,9 +51685,7 @@
                     "ifOutMulticastPkts": 15606354,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -51698,9 +51698,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51790,9 +51792,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -51805,9 +51805,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -51897,9 +51899,7 @@
                     "ifOutMulticastPkts": 15655443,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -51912,9 +51912,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52004,9 +52006,7 @@
                     "ifOutMulticastPkts": 15569208,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52019,9 +52019,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52111,9 +52113,7 @@
                     "ifOutMulticastPkts": 15572720,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52126,9 +52126,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52218,9 +52220,7 @@
                     "ifOutMulticastPkts": 15572926,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52233,9 +52233,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52325,9 +52327,7 @@
                     "ifOutMulticastPkts": 15644710,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52340,9 +52340,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52432,9 +52434,7 @@
                     "ifOutMulticastPkts": 15606646,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52447,9 +52447,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52539,9 +52541,7 @@
                     "ifOutMulticastPkts": 15601420,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52554,9 +52554,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52646,9 +52648,7 @@
                     "ifOutMulticastPkts": 15644970,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52661,9 +52661,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52753,9 +52755,7 @@
                     "ifOutMulticastPkts": 15394113,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52768,9 +52768,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52860,9 +52862,7 @@
                     "ifOutMulticastPkts": 15607663,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52875,9 +52875,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -52967,9 +52969,7 @@
                     "ifOutMulticastPkts": 15579833,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -52982,9 +52982,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53074,9 +53076,7 @@
                     "ifOutMulticastPkts": 15601247,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53089,9 +53089,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53181,9 +53183,7 @@
                     "ifOutMulticastPkts": 15602052,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -53196,9 +53196,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53288,9 +53290,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -53303,9 +53303,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -53395,9 +53397,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
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                 {
                     "port_descr_type": "cust",
@@ -53410,9 +53410,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53502,9 +53504,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -53517,9 +53517,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53609,9 +53611,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -53624,9 +53624,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -53716,9 +53718,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -53731,9 +53731,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53823,9 +53825,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -53838,9 +53838,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -53930,9 +53932,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -53945,9 +53945,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54037,9 +54039,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54052,9 +54052,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54144,9 +54146,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -54159,9 +54159,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54251,9 +54253,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
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@@ -54266,9 +54266,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54358,9 +54360,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": "cust",
@@ -54373,9 +54373,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54465,9 +54467,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54480,9 +54480,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": "up",
@@ -54572,9 +54574,7 @@
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-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54587,9 +54587,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
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@@ -54679,9 +54681,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54694,9 +54694,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
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@@ -54786,9 +54788,7 @@
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                     "ifOutMulticastPkts_delta": null,
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54801,9 +54801,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
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                     "ifHighSpeed": 1000,
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                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -54893,9 +54895,7 @@
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-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -54908,9 +54908,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55000,9 +55002,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55015,9 +55015,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55107,9 +55109,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55122,9 +55122,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55214,9 +55216,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -55229,9 +55229,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
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                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55321,9 +55323,7 @@
                     "ifOutMulticastPkts": 15605983,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55336,9 +55336,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55428,9 +55430,7 @@
                     "ifOutMulticastPkts": 15663752,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55443,9 +55443,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55535,9 +55537,7 @@
                     "ifOutMulticastPkts": 15643728,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55550,9 +55550,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55642,9 +55644,7 @@
                     "ifOutMulticastPkts": 3840695,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55657,9 +55657,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55749,9 +55751,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55764,9 +55764,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55856,9 +55858,7 @@
                     "ifOutMulticastPkts": 15601413,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55871,9 +55871,11 @@
                     "portName": null,
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                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55963,9 +55965,7 @@
                     "ifOutMulticastPkts": 15609952,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -55978,9 +55978,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56070,9 +56072,7 @@
                     "ifOutMulticastPkts": 15605321,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56085,9 +56085,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -56177,9 +56179,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56192,9 +56192,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56284,9 +56286,7 @@
                     "ifOutMulticastPkts": 15605957,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56299,9 +56299,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56391,9 +56393,7 @@
                     "ifOutMulticastPkts": 13920468,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56406,9 +56406,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56498,9 +56500,7 @@
                     "ifOutMulticastPkts": 15872270,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56513,9 +56513,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56605,9 +56607,7 @@
                     "ifOutMulticastPkts": 15554813,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "cust",
@@ -56620,9 +56620,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -56712,9 +56714,7 @@
                     "ifOutMulticastPkts": 15607357,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -56727,9 +56727,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -56819,9 +56821,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -56834,9 +56834,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -56926,9 +56928,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -56941,9 +56941,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -57033,9 +57035,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -57048,9 +57048,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -57140,9 +57142,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/vxoa.json b/tests/data/vxoa.json
index f6e408efa4..36fd29d01b 100644
--- a/tests/data/vxoa.json
+++ b/tests/data/vxoa.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -1874,9 +1874,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -1966,9 +1968,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1981,9 +1981,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2073,9 +2075,7 @@
                     "ifOutMulticastPkts": 35978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2088,9 +2088,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2180,9 +2182,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2195,9 +2195,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2287,9 +2289,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 6,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/webmon_edge.json b/tests/data/webmon_edge.json
index 6b5e6f0253..e3c1e7cd7b 100644
--- a/tests/data/webmon_edge.json
+++ b/tests/data/webmon_edge.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mfc5272 ethernet",
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/webmon_matrix.json b/tests/data/webmon_matrix.json
index 57a734d71e..af25938d19 100644
--- a/tests/data/webmon_matrix.json
+++ b/tests/data/webmon_matrix.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -269,9 +269,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -361,9 +363,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": "mfc5272 ethernet",
@@ -376,9 +376,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -468,9 +470,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/wisi-tangram.json b/tests/data/wisi-tangram.json
index 86c9e0d966..e2799ff30f 100644
--- a/tests/data/wisi-tangram.json
+++ b/tests/data/wisi-tangram.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/wut_57606.json b/tests/data/wut_57606.json
index 742414fa25..5818fb6c2e 100644
--- a/tests/data/wut_57606.json
+++ b/tests/data/wut_57606.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/wut_57613.json b/tests/data/wut_57613.json
index 79a73f9d11..dfe2859c3f 100644
--- a/tests/data/wut_57613.json
+++ b/tests/data/wut_57613.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/wut_57720.json b/tests/data/wut_57720.json
index c5efb2097c..c04170beb7 100644
--- a/tests/data/wut_57720.json
+++ b/tests/data/wut_57720.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -162,9 +162,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -254,9 +256,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/xirrus_aos.json b/tests/data/xirrus_aos.json
index dbf6e8d064..efb5ef95aa 100644
--- a/tests/data/xirrus_aos.json
+++ b/tests/data/xirrus_aos.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -2302,9 +2302,11 @@
                     "portName": null,
                     "ifIndex": 1,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2394,9 +2396,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2409,9 +2409,11 @@
                     "portName": null,
                     "ifIndex": 2,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2501,9 +2503,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2516,9 +2516,11 @@
                     "portName": null,
                     "ifIndex": 3,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2608,9 +2610,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2623,9 +2623,11 @@
                     "portName": null,
                     "ifIndex": 4,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2715,9 +2717,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2730,9 +2730,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -2822,9 +2824,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2837,9 +2837,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -2929,9 +2931,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2944,9 +2944,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3036,9 +3038,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3051,9 +3051,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3143,9 +3145,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3158,9 +3158,11 @@
                     "portName": null,
                     "ifIndex": 9,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3250,9 +3252,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3265,9 +3265,11 @@
                     "portName": null,
                     "ifIndex": 10,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3357,9 +3359,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3372,9 +3372,11 @@
                     "portName": null,
                     "ifIndex": 11,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3464,9 +3466,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3479,9 +3479,11 @@
                     "portName": null,
                     "ifIndex": 12,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3571,9 +3573,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3586,9 +3586,11 @@
                     "portName": null,
                     "ifIndex": 13,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3678,9 +3680,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3693,9 +3693,11 @@
                     "portName": null,
                     "ifIndex": 14,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -3785,9 +3787,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3800,9 +3800,11 @@
                     "portName": null,
                     "ifIndex": 15,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -3892,9 +3894,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3907,9 +3907,11 @@
                     "portName": null,
                     "ifIndex": 16,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -3999,9 +4001,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4014,9 +4014,11 @@
                     "portName": null,
                     "ifIndex": 17,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4106,9 +4108,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4121,9 +4121,11 @@
                     "portName": null,
                     "ifIndex": 18,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4213,9 +4215,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4228,9 +4228,11 @@
                     "portName": null,
                     "ifIndex": 19,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4320,9 +4322,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4335,9 +4335,11 @@
                     "portName": null,
                     "ifIndex": 20,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -4427,9 +4429,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4442,9 +4442,11 @@
                     "portName": null,
                     "ifIndex": 21,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -4534,9 +4536,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/zmtel.json b/tests/data/zmtel.json
index 43f23ba28c..7923a56a38 100644
--- a/tests/data/zmtel.json
+++ b/tests/data/zmtel.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -483,9 +483,11 @@
                     "portName": null,
                     "ifIndex": 5,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -575,9 +577,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -590,9 +590,11 @@
                     "portName": null,
                     "ifIndex": 6,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -682,9 +684,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -697,9 +697,11 @@
                     "portName": null,
                     "ifIndex": 7,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -789,9 +791,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -804,9 +804,11 @@
                     "portName": null,
                     "ifIndex": 8,
                     "ifSpeed": 10000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "false",
                     "ifHighSpeed": 10,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -896,9 +898,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/zxdsl.json b/tests/data/zxdsl.json
index 009baac6db..d90567e900 100644
--- a/tests/data/zxdsl.json
+++ b/tests/data/zxdsl.json
@@ -51,9 +51,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -143,9 +145,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -158,9 +158,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -250,9 +252,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -265,9 +265,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -357,9 +359,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -372,9 +372,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -464,9 +466,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -479,9 +479,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -571,9 +573,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -586,9 +586,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -678,9 +680,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -693,9 +693,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -785,9 +787,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -800,9 +800,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -892,9 +894,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -907,9 +907,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -999,9 +1001,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1014,9 +1014,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1106,9 +1108,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1121,9 +1121,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1213,9 +1215,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1228,9 +1228,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1320,9 +1322,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1335,9 +1335,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1427,9 +1429,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1442,9 +1442,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1534,9 +1536,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1549,9 +1549,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1641,9 +1643,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1656,9 +1656,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1748,9 +1750,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1763,9 +1763,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1855,9 +1857,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1870,9 +1870,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1962,9 +1964,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1977,9 +1977,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2069,9 +2071,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2084,9 +2084,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2176,9 +2178,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2191,9 +2191,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2283,9 +2285,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2298,9 +2298,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2390,9 +2392,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2405,9 +2405,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2497,9 +2499,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2512,9 +2512,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2604,9 +2606,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2619,9 +2619,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2711,9 +2713,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2726,9 +2726,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2818,9 +2820,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2833,9 +2833,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2925,9 +2927,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2940,9 +2940,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3032,9 +3034,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3047,9 +3047,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3139,9 +3141,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3154,9 +3154,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3246,9 +3248,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3261,9 +3261,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3353,9 +3355,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3368,9 +3368,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3460,9 +3462,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3475,9 +3475,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3567,9 +3569,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3582,9 +3582,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3674,9 +3676,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3689,9 +3689,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3781,9 +3783,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3796,9 +3796,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3888,9 +3890,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3903,9 +3903,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3995,9 +3997,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4010,9 +4010,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4102,9 +4104,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4117,9 +4117,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4209,9 +4211,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4224,9 +4224,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4316,9 +4318,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4331,9 +4331,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4423,9 +4425,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4438,9 +4438,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4530,9 +4532,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4545,9 +4545,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4637,9 +4639,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4652,9 +4652,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4744,9 +4746,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4759,9 +4759,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4851,9 +4853,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4866,9 +4866,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4958,9 +4960,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4973,9 +4973,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5065,9 +5067,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5080,9 +5080,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5172,9 +5174,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5187,9 +5187,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5279,9 +5281,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5294,9 +5294,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5386,9 +5388,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5401,9 +5401,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5493,9 +5495,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5508,9 +5508,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5600,9 +5602,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5615,9 +5615,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5707,9 +5709,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5722,9 +5722,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5814,9 +5816,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5829,9 +5829,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5921,9 +5923,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5936,9 +5936,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6028,9 +6030,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6043,9 +6043,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6135,9 +6137,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6150,9 +6150,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6242,9 +6244,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6257,9 +6257,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6349,9 +6351,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6364,9 +6364,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6456,9 +6458,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6471,9 +6471,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6563,9 +6565,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6578,9 +6578,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6670,9 +6672,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6685,9 +6685,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6777,9 +6779,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6792,9 +6792,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6884,9 +6886,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6899,9 +6899,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6991,9 +6993,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7006,9 +7006,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7098,9 +7100,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7113,9 +7113,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7205,9 +7207,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7220,9 +7220,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7312,9 +7314,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7327,9 +7327,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7419,9 +7421,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -7434,9 +7434,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7526,9 +7528,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7541,9 +7541,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7633,9 +7635,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7648,9 +7648,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7740,9 +7742,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7755,9 +7755,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7847,9 +7849,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7862,9 +7862,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -7954,9 +7956,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7969,9 +7969,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8061,9 +8063,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8076,9 +8076,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8168,9 +8170,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8183,9 +8183,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8275,9 +8277,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8290,9 +8290,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8382,9 +8384,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8397,9 +8397,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8489,9 +8491,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8504,9 +8504,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8596,9 +8598,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8611,9 +8611,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8703,9 +8705,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8718,9 +8718,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8810,9 +8812,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8825,9 +8825,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -8917,9 +8919,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8932,9 +8932,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9024,9 +9026,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9039,9 +9039,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9131,9 +9133,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9146,9 +9146,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9238,9 +9240,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9253,9 +9253,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9345,9 +9347,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9360,9 +9360,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9452,9 +9454,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9467,9 +9467,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9559,9 +9561,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9574,9 +9574,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9666,9 +9668,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9681,9 +9681,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9773,9 +9775,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9788,9 +9788,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9880,9 +9882,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9895,9 +9895,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -9987,9 +9989,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10002,9 +10002,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10094,9 +10096,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10109,9 +10109,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10201,9 +10203,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10216,9 +10216,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10308,9 +10310,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10323,9 +10323,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10415,9 +10417,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10430,9 +10430,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10522,9 +10524,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10537,9 +10537,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10629,9 +10631,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10644,9 +10644,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -10736,9 +10738,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10751,9 +10751,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10843,9 +10845,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10858,9 +10858,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10950,9 +10952,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10965,9 +10965,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11057,9 +11059,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11072,9 +11072,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11164,9 +11166,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11179,9 +11179,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11271,9 +11273,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11286,9 +11286,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11378,9 +11380,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11393,9 +11393,11 @@
                     "portName": null,
                     "ifIndex": 171,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11485,9 +11487,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11500,9 +11500,11 @@
                     "portName": null,
                     "ifIndex": 172,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11592,9 +11594,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11607,9 +11607,11 @@
                     "portName": null,
                     "ifIndex": 173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11699,9 +11701,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11714,9 +11714,11 @@
                     "portName": null,
                     "ifIndex": 174,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11806,9 +11808,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11821,9 +11821,11 @@
                     "portName": null,
                     "ifIndex": 175,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11913,9 +11915,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11928,9 +11928,11 @@
                     "portName": null,
                     "ifIndex": 176,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12020,9 +12022,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12035,9 +12035,11 @@
                     "portName": null,
                     "ifIndex": 177,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12127,9 +12129,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12142,9 +12142,11 @@
                     "portName": null,
                     "ifIndex": 178,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12234,9 +12236,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12249,9 +12249,11 @@
                     "portName": null,
                     "ifIndex": 179,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12341,9 +12343,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12356,9 +12356,11 @@
                     "portName": null,
                     "ifIndex": 180,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12448,9 +12450,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12463,9 +12463,11 @@
                     "portName": null,
                     "ifIndex": 181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12555,9 +12557,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12570,9 +12570,11 @@
                     "portName": null,
                     "ifIndex": 182,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12662,9 +12664,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12677,9 +12677,11 @@
                     "portName": null,
                     "ifIndex": 183,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12769,9 +12771,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12784,9 +12784,11 @@
                     "portName": null,
                     "ifIndex": 184,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12876,9 +12878,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12891,9 +12891,11 @@
                     "portName": null,
                     "ifIndex": 185,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12983,9 +12985,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12998,9 +12998,11 @@
                     "portName": null,
                     "ifIndex": 186,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13090,9 +13092,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13105,9 +13105,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13197,9 +13199,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13212,9 +13212,11 @@
                     "portName": null,
                     "ifIndex": 188,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13304,9 +13306,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13319,9 +13319,11 @@
                     "portName": null,
                     "ifIndex": 189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13411,9 +13413,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13426,9 +13426,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13518,9 +13520,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13533,9 +13533,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13625,9 +13627,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13640,9 +13640,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13732,9 +13734,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -13747,9 +13747,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13839,9 +13841,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13854,9 +13854,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -13946,9 +13948,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13961,9 +13961,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14053,9 +14055,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14068,9 +14068,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -14160,9 +14162,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14175,9 +14175,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14267,9 +14269,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14282,9 +14282,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14374,9 +14376,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14389,9 +14389,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14481,9 +14483,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14496,9 +14496,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -14588,9 +14590,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14603,9 +14603,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14695,9 +14697,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14710,9 +14710,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14802,9 +14804,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14817,9 +14817,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -14909,9 +14911,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14924,9 +14924,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15016,9 +15018,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15031,9 +15031,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15123,9 +15125,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15138,9 +15138,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -15230,9 +15232,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15245,9 +15245,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15337,9 +15339,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15352,9 +15352,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15444,9 +15446,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15459,9 +15459,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15551,9 +15553,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15566,9 +15566,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15658,9 +15660,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15673,9 +15673,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15765,9 +15767,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15780,9 +15780,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15872,9 +15874,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15887,9 +15887,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -15979,9 +15981,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15994,9 +15994,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16086,9 +16088,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16101,9 +16101,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16193,9 +16195,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16208,9 +16208,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16300,9 +16302,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16315,9 +16315,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16407,9 +16409,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16422,9 +16422,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16514,9 +16516,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16529,9 +16529,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16621,9 +16623,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16636,9 +16636,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16728,9 +16730,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16743,9 +16743,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -16835,9 +16837,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16850,9 +16850,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -16942,9 +16944,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16957,9 +16957,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -17049,9 +17051,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17064,9 +17064,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -17156,9 +17158,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17171,9 +17171,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -17263,9 +17265,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17278,9 +17278,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17370,9 +17372,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17385,9 +17385,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17477,9 +17479,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17492,9 +17492,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17584,9 +17586,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17599,9 +17599,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17691,9 +17693,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17706,9 +17706,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17798,9 +17800,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17813,9 +17813,11 @@
                     "portName": null,
                     "ifIndex": 231,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -17905,9 +17907,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17920,9 +17920,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18012,9 +18014,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18027,9 +18027,11 @@
                     "portName": null,
                     "ifIndex": 233,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18119,9 +18121,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18134,9 +18134,11 @@
                     "portName": null,
                     "ifIndex": 234,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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@@ -18226,9 +18228,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18241,9 +18241,11 @@
                     "portName": null,
                     "ifIndex": 235,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18333,9 +18335,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18348,9 +18348,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18440,9 +18442,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18455,9 +18455,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18547,9 +18549,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18562,9 +18562,11 @@
                     "portName": null,
                     "ifIndex": 238,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -18654,9 +18656,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18669,9 +18669,11 @@
                     "portName": null,
                     "ifIndex": 239,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18761,9 +18763,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18776,9 +18776,11 @@
                     "portName": null,
                     "ifIndex": 240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18868,9 +18870,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18883,9 +18883,11 @@
                     "portName": null,
                     "ifIndex": 241,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -18975,9 +18977,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18990,9 +18990,11 @@
                     "portName": null,
                     "ifIndex": 242,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19082,9 +19084,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19097,9 +19097,11 @@
                     "portName": null,
                     "ifIndex": 243,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19189,9 +19191,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19204,9 +19204,11 @@
                     "portName": null,
                     "ifIndex": 244,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19296,9 +19298,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19311,9 +19311,11 @@
                     "portName": null,
                     "ifIndex": 245,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19403,9 +19405,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19418,9 +19418,11 @@
                     "portName": null,
                     "ifIndex": 246,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19510,9 +19512,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19525,9 +19525,11 @@
                     "portName": null,
                     "ifIndex": 247,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19617,9 +19619,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19632,9 +19632,11 @@
                     "portName": null,
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                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19724,9 +19726,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19739,9 +19739,11 @@
                     "portName": null,
                     "ifIndex": 249,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -19831,9 +19833,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19846,9 +19846,11 @@
                     "portName": null,
                     "ifIndex": 250,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -19938,9 +19940,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19953,9 +19953,11 @@
                     "portName": null,
                     "ifIndex": 251,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20045,9 +20047,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20060,9 +20060,11 @@
                     "portName": null,
                     "ifIndex": 252,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20152,9 +20154,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20167,9 +20167,11 @@
                     "portName": null,
                     "ifIndex": 253,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -20259,9 +20261,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20274,9 +20274,11 @@
                     "portName": null,
                     "ifIndex": 254,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20366,9 +20368,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20381,9 +20381,11 @@
                     "portName": null,
                     "ifIndex": 255,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20473,9 +20475,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20488,9 +20488,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20580,9 +20582,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20595,9 +20595,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20687,9 +20689,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20702,9 +20702,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20794,9 +20796,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20809,9 +20809,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -20901,9 +20903,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20916,9 +20916,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21008,9 +21010,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21023,9 +21023,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21115,9 +21117,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21130,9 +21130,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21222,9 +21224,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21237,9 +21237,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21329,9 +21331,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21344,9 +21344,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21436,9 +21438,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21451,9 +21451,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21543,9 +21545,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21558,9 +21558,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21650,9 +21652,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21665,9 +21665,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21757,9 +21759,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21772,9 +21772,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21864,9 +21866,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21879,9 +21879,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -21971,9 +21973,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21986,9 +21986,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22078,9 +22080,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22093,9 +22093,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22185,9 +22187,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22200,9 +22200,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22292,9 +22294,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22307,9 +22307,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22399,9 +22401,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22414,9 +22414,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22506,9 +22508,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22521,9 +22521,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22613,9 +22615,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22628,9 +22628,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22720,9 +22722,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22735,9 +22735,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22827,9 +22829,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22842,9 +22842,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -22934,9 +22936,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22949,9 +22949,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23041,9 +23043,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23056,9 +23056,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23148,9 +23150,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23163,9 +23163,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -23255,9 +23257,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23270,9 +23270,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23362,9 +23364,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23377,9 +23377,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23469,9 +23471,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23484,9 +23484,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
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                     "ifAdminStatus": null,
@@ -23576,9 +23578,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23591,9 +23591,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23683,9 +23685,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23698,9 +23698,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23790,9 +23792,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23805,9 +23805,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -23897,9 +23899,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23912,9 +23912,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24004,9 +24006,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24019,9 +24019,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24111,9 +24113,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24126,9 +24126,11 @@
                     "portName": null,
                     "ifIndex": 290,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24218,9 +24220,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24233,9 +24233,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24325,9 +24327,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24340,9 +24340,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24432,9 +24434,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24447,9 +24447,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24539,9 +24541,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24554,9 +24554,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24646,9 +24648,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24661,9 +24661,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24753,9 +24755,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24768,9 +24768,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24860,9 +24862,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24875,9 +24875,11 @@
                     "portName": null,
                     "ifIndex": 297,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -24967,9 +24969,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24982,9 +24982,11 @@
                     "portName": null,
                     "ifIndex": 298,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25074,9 +25076,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25089,9 +25089,11 @@
                     "portName": null,
                     "ifIndex": 299,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25181,9 +25183,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25196,9 +25196,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25288,9 +25290,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25303,9 +25303,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25395,9 +25397,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25410,9 +25410,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25502,9 +25504,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25517,9 +25517,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25609,9 +25611,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25624,9 +25624,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25716,9 +25718,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25731,9 +25731,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25823,9 +25825,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25838,9 +25838,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -25930,9 +25932,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25945,9 +25945,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26037,9 +26039,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26052,9 +26052,11 @@
                     "portName": null,
                     "ifIndex": 308,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26144,9 +26146,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26159,9 +26159,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26251,9 +26253,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26266,9 +26266,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26358,9 +26360,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26373,9 +26373,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26465,9 +26467,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26480,9 +26480,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26572,9 +26574,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26587,9 +26587,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26679,9 +26681,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26694,9 +26694,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26786,9 +26788,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26801,9 +26801,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -26893,9 +26895,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26908,9 +26908,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27000,9 +27002,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27015,9 +27015,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27107,9 +27109,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27122,9 +27122,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27214,9 +27216,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27229,9 +27229,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27321,9 +27323,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27336,9 +27336,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27428,9 +27430,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27443,9 +27443,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27535,9 +27537,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27550,9 +27550,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -27642,9 +27644,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -27661,9 +27661,11 @@
                     "portName": null,
                     "ifIndex": 65,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27753,9 +27755,7 @@
                     "ifOutMulticastPkts": 46939,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27768,9 +27768,11 @@
                     "portName": null,
                     "ifIndex": 66,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27860,9 +27862,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27875,9 +27875,11 @@
                     "portName": null,
                     "ifIndex": 67,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27967,9 +27969,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -27982,9 +27982,11 @@
                     "portName": null,
                     "ifIndex": 68,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28074,9 +28076,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28089,9 +28089,11 @@
                     "portName": null,
                     "ifIndex": 69,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28181,9 +28183,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28196,9 +28196,11 @@
                     "portName": null,
                     "ifIndex": 70,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28288,9 +28290,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28303,9 +28303,11 @@
                     "portName": null,
                     "ifIndex": 71,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28395,9 +28397,7 @@
                     "ifOutMulticastPkts": 46965,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28410,9 +28410,11 @@
                     "portName": null,
                     "ifIndex": 72,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28502,9 +28504,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28517,9 +28517,11 @@
                     "portName": null,
                     "ifIndex": 73,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28609,9 +28611,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28624,9 +28624,11 @@
                     "portName": null,
                     "ifIndex": 74,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28716,9 +28718,7 @@
                     "ifOutMulticastPkts": 46979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28731,9 +28731,11 @@
                     "portName": null,
                     "ifIndex": 75,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28823,9 +28825,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28838,9 +28838,11 @@
                     "portName": null,
                     "ifIndex": 76,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -28930,9 +28932,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -28945,9 +28945,11 @@
                     "portName": null,
                     "ifIndex": 77,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29037,9 +29039,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29052,9 +29052,11 @@
                     "portName": null,
                     "ifIndex": 78,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29144,9 +29146,7 @@
                     "ifOutMulticastPkts": 46969,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29159,9 +29159,11 @@
                     "portName": null,
                     "ifIndex": 79,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29251,9 +29253,7 @@
                     "ifOutMulticastPkts": 46964,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29266,9 +29266,11 @@
                     "portName": null,
                     "ifIndex": 80,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29358,9 +29360,7 @@
                     "ifOutMulticastPkts": 46945,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29373,9 +29373,11 @@
                     "portName": null,
                     "ifIndex": 81,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29465,9 +29467,7 @@
                     "ifOutMulticastPkts": 46967,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29480,9 +29480,11 @@
                     "portName": null,
                     "ifIndex": 82,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29572,9 +29574,7 @@
                     "ifOutMulticastPkts": 46938,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29587,9 +29587,11 @@
                     "portName": null,
                     "ifIndex": 83,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29679,9 +29681,7 @@
                     "ifOutMulticastPkts": 46942,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29694,9 +29694,11 @@
                     "portName": null,
                     "ifIndex": 84,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29786,9 +29788,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29801,9 +29801,11 @@
                     "portName": null,
                     "ifIndex": 85,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -29893,9 +29895,7 @@
                     "ifOutMulticastPkts": 46966,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -29908,9 +29908,11 @@
                     "portName": null,
                     "ifIndex": 86,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30000,9 +30002,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30015,9 +30015,11 @@
                     "portName": null,
                     "ifIndex": 87,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30107,9 +30109,7 @@
                     "ifOutMulticastPkts": 46965,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30122,9 +30122,11 @@
                     "portName": null,
                     "ifIndex": 88,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30214,9 +30216,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30229,9 +30229,11 @@
                     "portName": null,
                     "ifIndex": 89,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30321,9 +30323,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30336,9 +30336,11 @@
                     "portName": null,
                     "ifIndex": 90,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30428,9 +30430,7 @@
                     "ifOutMulticastPkts": 46967,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30443,9 +30443,11 @@
                     "portName": null,
                     "ifIndex": 91,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30535,9 +30537,7 @@
                     "ifOutMulticastPkts": 46968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30550,9 +30550,11 @@
                     "portName": null,
                     "ifIndex": 92,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30642,9 +30644,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30657,9 +30657,11 @@
                     "portName": null,
                     "ifIndex": 93,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30749,9 +30751,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30764,9 +30764,11 @@
                     "portName": null,
                     "ifIndex": 94,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30856,9 +30858,7 @@
                     "ifOutMulticastPkts": 46902,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30871,9 +30871,11 @@
                     "portName": null,
                     "ifIndex": 95,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -30963,9 +30965,7 @@
                     "ifOutMulticastPkts": 46969,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -30978,9 +30978,11 @@
                     "portName": null,
                     "ifIndex": 96,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31070,9 +31072,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31085,9 +31085,11 @@
                     "portName": null,
                     "ifIndex": 97,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31177,9 +31179,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31192,9 +31192,11 @@
                     "portName": null,
                     "ifIndex": 98,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31284,9 +31286,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31299,9 +31299,11 @@
                     "portName": null,
                     "ifIndex": 99,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31391,9 +31393,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31406,9 +31406,11 @@
                     "portName": null,
                     "ifIndex": 100,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31498,9 +31500,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31513,9 +31513,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31605,9 +31607,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31620,9 +31620,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31712,9 +31714,7 @@
                     "ifOutMulticastPkts": 46949,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31727,9 +31727,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31819,9 +31821,7 @@
                     "ifOutMulticastPkts": 46955,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31834,9 +31834,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -31926,9 +31928,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -31941,9 +31941,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32033,9 +32035,7 @@
                     "ifOutMulticastPkts": 46968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32048,9 +32048,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32140,9 +32142,7 @@
                     "ifOutMulticastPkts": 46971,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32155,9 +32155,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32247,9 +32249,7 @@
                     "ifOutMulticastPkts": 46785,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32262,9 +32262,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32354,9 +32356,7 @@
                     "ifOutMulticastPkts": 46970,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32369,9 +32369,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32461,9 +32463,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32476,9 +32476,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32568,9 +32570,7 @@
                     "ifOutMulticastPkts": 46940,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32583,9 +32583,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32675,9 +32677,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32690,9 +32690,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32782,9 +32784,7 @@
                     "ifOutMulticastPkts": 46953,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32797,9 +32797,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32889,9 +32891,7 @@
                     "ifOutMulticastPkts": 46968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -32904,9 +32904,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -32996,9 +32998,7 @@
                     "ifOutMulticastPkts": 46979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33011,9 +33011,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33103,9 +33105,7 @@
                     "ifOutMulticastPkts": 46979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33118,9 +33118,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33210,9 +33212,7 @@
                     "ifOutMulticastPkts": 46964,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33225,9 +33225,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33317,9 +33319,7 @@
                     "ifOutMulticastPkts": 46970,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33332,9 +33332,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33424,9 +33426,7 @@
                     "ifOutMulticastPkts": 46979,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33439,9 +33439,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33531,9 +33533,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33546,9 +33546,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33638,9 +33640,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33653,9 +33653,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33745,9 +33747,7 @@
                     "ifOutMulticastPkts": 46967,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33760,9 +33760,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -33852,9 +33854,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33867,9 +33867,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -33959,9 +33961,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -33974,9 +33974,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34066,9 +34068,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34081,9 +34081,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34173,9 +34175,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34188,9 +34188,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34280,9 +34282,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34295,9 +34295,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34387,9 +34389,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34402,9 +34402,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -34494,9 +34496,7 @@
                     "ifOutMulticastPkts": 46980,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34509,9 +34509,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34601,9 +34603,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34616,9 +34616,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34708,9 +34710,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34723,9 +34723,11 @@
                     "portName": null,
                     "ifIndex": 131,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34815,9 +34817,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34830,9 +34830,11 @@
                     "portName": null,
                     "ifIndex": 132,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -34922,9 +34924,7 @@
                     "ifOutMulticastPkts": 46973,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -34937,9 +34937,11 @@
                     "portName": null,
                     "ifIndex": 133,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35029,9 +35031,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35044,9 +35044,11 @@
                     "portName": null,
                     "ifIndex": 134,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35136,9 +35138,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35151,9 +35151,11 @@
                     "portName": null,
                     "ifIndex": 135,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35243,9 +35245,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35258,9 +35258,11 @@
                     "portName": null,
                     "ifIndex": 136,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35350,9 +35352,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35365,9 +35365,11 @@
                     "portName": null,
                     "ifIndex": 137,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35457,9 +35459,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35472,9 +35472,11 @@
                     "portName": null,
                     "ifIndex": 138,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35564,9 +35566,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35579,9 +35579,11 @@
                     "portName": null,
                     "ifIndex": 139,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35671,9 +35673,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35686,9 +35686,11 @@
                     "portName": null,
                     "ifIndex": 140,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35778,9 +35780,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35793,9 +35793,11 @@
                     "portName": null,
                     "ifIndex": 141,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35885,9 +35887,7 @@
                     "ifOutMulticastPkts": 46958,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -35900,9 +35900,11 @@
                     "portName": null,
                     "ifIndex": 142,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -35992,9 +35994,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36007,9 +36007,11 @@
                     "portName": null,
                     "ifIndex": 143,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36099,9 +36101,7 @@
                     "ifOutMulticastPkts": 46895,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36114,9 +36114,11 @@
                     "portName": null,
                     "ifIndex": 144,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36206,9 +36208,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36221,9 +36221,11 @@
                     "portName": null,
                     "ifIndex": 145,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36313,9 +36315,7 @@
                     "ifOutMulticastPkts": 46970,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36328,9 +36328,11 @@
                     "portName": null,
                     "ifIndex": 146,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36420,9 +36422,7 @@
                     "ifOutMulticastPkts": 46970,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36435,9 +36435,11 @@
                     "portName": null,
                     "ifIndex": 147,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36527,9 +36529,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36542,9 +36542,11 @@
                     "portName": null,
                     "ifIndex": 148,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36634,9 +36636,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36649,9 +36649,11 @@
                     "portName": null,
                     "ifIndex": 149,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36741,9 +36743,7 @@
                     "ifOutMulticastPkts": 46972,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36756,9 +36756,11 @@
                     "portName": null,
                     "ifIndex": 150,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -36848,9 +36850,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36863,9 +36863,11 @@
                     "portName": null,
                     "ifIndex": 151,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -36955,9 +36957,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -36970,9 +36970,11 @@
                     "portName": null,
                     "ifIndex": 152,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37062,9 +37064,7 @@
                     "ifOutMulticastPkts": 46949,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37077,9 +37077,11 @@
                     "portName": null,
                     "ifIndex": 153,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37169,9 +37171,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37184,9 +37184,11 @@
                     "portName": null,
                     "ifIndex": 154,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37276,9 +37278,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37291,9 +37291,11 @@
                     "portName": null,
                     "ifIndex": 155,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37383,9 +37385,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37398,9 +37398,11 @@
                     "portName": null,
                     "ifIndex": 156,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37490,9 +37492,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37505,9 +37505,11 @@
                     "portName": null,
                     "ifIndex": 157,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37597,9 +37599,7 @@
                     "ifOutMulticastPkts": 46961,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37612,9 +37612,11 @@
                     "portName": null,
                     "ifIndex": 158,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37704,9 +37706,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37719,9 +37719,11 @@
                     "portName": null,
                     "ifIndex": 159,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37811,9 +37813,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37826,9 +37826,11 @@
                     "portName": null,
                     "ifIndex": 160,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -37918,9 +37920,7 @@
                     "ifOutMulticastPkts": 46982,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -37933,9 +37933,11 @@
                     "portName": null,
                     "ifIndex": 161,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38025,9 +38027,7 @@
                     "ifOutMulticastPkts": 46966,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38040,9 +38040,11 @@
                     "portName": null,
                     "ifIndex": 162,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38132,9 +38134,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38147,9 +38147,11 @@
                     "portName": null,
                     "ifIndex": 163,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38239,9 +38241,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38254,9 +38254,11 @@
                     "portName": null,
                     "ifIndex": 164,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -38346,9 +38348,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38361,9 +38361,11 @@
                     "portName": null,
                     "ifIndex": 165,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38453,9 +38455,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38468,9 +38468,11 @@
                     "portName": null,
                     "ifIndex": 166,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38560,9 +38562,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38575,9 +38575,11 @@
                     "portName": null,
                     "ifIndex": 167,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38667,9 +38669,7 @@
                     "ifOutMulticastPkts": 46971,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38682,9 +38682,11 @@
                     "portName": null,
                     "ifIndex": 168,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38774,9 +38776,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38789,9 +38789,11 @@
                     "portName": null,
                     "ifIndex": 169,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38881,9 +38883,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -38896,9 +38896,11 @@
                     "portName": null,
                     "ifIndex": 170,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -38988,9 +38990,7 @@
                     "ifOutMulticastPkts": 46976,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39003,9 +39003,11 @@
                     "portName": null,
                     "ifIndex": 171,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39095,9 +39097,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39110,9 +39110,11 @@
                     "portName": null,
                     "ifIndex": 172,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39202,9 +39204,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39217,9 +39217,11 @@
                     "portName": null,
                     "ifIndex": 173,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39309,9 +39311,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39324,9 +39324,11 @@
                     "portName": null,
                     "ifIndex": 174,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39416,9 +39418,7 @@
                     "ifOutMulticastPkts": 46944,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39431,9 +39431,11 @@
                     "portName": null,
                     "ifIndex": 175,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39523,9 +39525,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39538,9 +39538,11 @@
                     "portName": null,
                     "ifIndex": 176,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39630,9 +39632,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39645,9 +39645,11 @@
                     "portName": null,
                     "ifIndex": 177,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39737,9 +39739,7 @@
                     "ifOutMulticastPkts": 46929,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39752,9 +39752,11 @@
                     "portName": null,
                     "ifIndex": 178,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39844,9 +39846,7 @@
                     "ifOutMulticastPkts": 46938,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39859,9 +39859,11 @@
                     "portName": null,
                     "ifIndex": 179,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -39951,9 +39953,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -39966,9 +39966,11 @@
                     "portName": null,
                     "ifIndex": 180,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40058,9 +40060,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40073,9 +40073,11 @@
                     "portName": null,
                     "ifIndex": 181,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40165,9 +40167,7 @@
                     "ifOutMulticastPkts": 46968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40180,9 +40180,11 @@
                     "portName": null,
                     "ifIndex": 182,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40272,9 +40274,7 @@
                     "ifOutMulticastPkts": 46977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40287,9 +40287,11 @@
                     "portName": null,
                     "ifIndex": 183,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40379,9 +40381,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40394,9 +40394,11 @@
                     "portName": null,
                     "ifIndex": 184,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40486,9 +40488,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40501,9 +40501,11 @@
                     "portName": null,
                     "ifIndex": 185,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40593,9 +40595,7 @@
                     "ifOutMulticastPkts": 46553,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40608,9 +40608,11 @@
                     "portName": null,
                     "ifIndex": 186,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40700,9 +40702,7 @@
                     "ifOutMulticastPkts": 46539,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40715,9 +40715,11 @@
                     "portName": null,
                     "ifIndex": 187,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40807,9 +40809,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40822,9 +40822,11 @@
                     "portName": null,
                     "ifIndex": 188,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -40914,9 +40916,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -40929,9 +40929,11 @@
                     "portName": null,
                     "ifIndex": 189,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41021,9 +41023,7 @@
                     "ifOutMulticastPkts": 46913,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41036,9 +41036,11 @@
                     "portName": null,
                     "ifIndex": 190,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41128,9 +41130,7 @@
                     "ifOutMulticastPkts": 46964,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41143,9 +41143,11 @@
                     "portName": null,
                     "ifIndex": 191,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41235,9 +41237,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41250,9 +41250,11 @@
                     "portName": null,
                     "ifIndex": 192,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41342,9 +41344,7 @@
                     "ifOutMulticastPkts": 46964,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41357,9 +41357,11 @@
                     "portName": null,
                     "ifIndex": 193,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41449,9 +41451,7 @@
                     "ifOutMulticastPkts": 46973,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41464,9 +41464,11 @@
                     "portName": null,
                     "ifIndex": 194,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41556,9 +41558,7 @@
                     "ifOutMulticastPkts": 46974,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41571,9 +41571,11 @@
                     "portName": null,
                     "ifIndex": 195,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41663,9 +41665,7 @@
                     "ifOutMulticastPkts": 46975,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41678,9 +41678,11 @@
                     "portName": null,
                     "ifIndex": 196,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -41770,9 +41772,7 @@
                     "ifOutMulticastPkts": 46971,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41785,9 +41785,11 @@
                     "portName": null,
                     "ifIndex": 197,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41877,9 +41879,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41892,9 +41892,11 @@
                     "portName": null,
                     "ifIndex": 198,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -41984,9 +41986,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -41999,9 +41999,11 @@
                     "portName": null,
                     "ifIndex": 199,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42091,9 +42093,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42106,9 +42106,11 @@
                     "portName": null,
                     "ifIndex": 200,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42198,9 +42200,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42213,9 +42213,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42305,9 +42307,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42320,9 +42320,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42412,9 +42414,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42427,9 +42427,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42519,9 +42521,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42534,9 +42534,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42626,9 +42628,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42641,9 +42641,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42733,9 +42735,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42748,9 +42748,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42840,9 +42842,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42855,9 +42855,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -42947,9 +42949,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -42962,9 +42962,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43054,9 +43056,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43069,9 +43069,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43161,9 +43163,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43176,9 +43176,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43268,9 +43270,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43283,9 +43283,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43375,9 +43377,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43390,9 +43390,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43482,9 +43484,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43497,9 +43497,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43589,9 +43591,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43604,9 +43604,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43696,9 +43698,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43711,9 +43711,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43803,9 +43805,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43818,9 +43818,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -43910,9 +43912,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -43925,9 +43925,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44017,9 +44019,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44032,9 +44032,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44124,9 +44126,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44139,9 +44139,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44231,9 +44233,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44246,9 +44246,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44338,9 +44340,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44353,9 +44353,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44445,9 +44447,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44460,9 +44460,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44552,9 +44554,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44567,9 +44567,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44659,9 +44661,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44674,9 +44674,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -44766,9 +44768,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44781,9 +44781,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -44873,9 +44875,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44888,9 +44888,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -44980,9 +44982,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -44995,9 +44995,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45087,9 +45089,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45102,9 +45102,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -45194,9 +45196,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45209,9 +45209,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45301,9 +45303,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45316,9 +45316,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45408,9 +45410,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45423,9 +45423,11 @@
                     "portName": null,
                     "ifIndex": 231,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45515,9 +45517,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45530,9 +45530,11 @@
                     "portName": null,
                     "ifIndex": 232,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45622,9 +45624,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45637,9 +45637,11 @@
                     "portName": null,
                     "ifIndex": 233,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45729,9 +45731,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45744,9 +45744,11 @@
                     "portName": null,
                     "ifIndex": 234,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45836,9 +45838,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45851,9 +45851,11 @@
                     "portName": null,
                     "ifIndex": 235,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -45943,9 +45945,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -45958,9 +45958,11 @@
                     "portName": null,
                     "ifIndex": 236,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46050,9 +46052,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46065,9 +46065,11 @@
                     "portName": null,
                     "ifIndex": 237,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46157,9 +46159,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46172,9 +46172,11 @@
                     "portName": null,
                     "ifIndex": 238,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46264,9 +46266,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46279,9 +46279,11 @@
                     "portName": null,
                     "ifIndex": 239,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46371,9 +46373,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46386,9 +46386,11 @@
                     "portName": null,
                     "ifIndex": 240,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46478,9 +46480,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46493,9 +46493,11 @@
                     "portName": null,
                     "ifIndex": 241,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46585,9 +46587,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46600,9 +46600,11 @@
                     "portName": null,
                     "ifIndex": 242,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46692,9 +46694,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46707,9 +46707,11 @@
                     "portName": null,
                     "ifIndex": 243,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46799,9 +46801,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46814,9 +46814,11 @@
                     "portName": null,
                     "ifIndex": 244,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -46906,9 +46908,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -46921,9 +46921,11 @@
                     "portName": null,
                     "ifIndex": 245,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47013,9 +47015,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47028,9 +47028,11 @@
                     "portName": null,
                     "ifIndex": 246,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47120,9 +47122,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47135,9 +47135,11 @@
                     "portName": null,
                     "ifIndex": 247,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47227,9 +47229,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47242,9 +47242,11 @@
                     "portName": null,
                     "ifIndex": 248,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47334,9 +47336,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47349,9 +47349,11 @@
                     "portName": null,
                     "ifIndex": 249,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47441,9 +47443,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47456,9 +47456,11 @@
                     "portName": null,
                     "ifIndex": 250,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47548,9 +47550,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47563,9 +47563,11 @@
                     "portName": null,
                     "ifIndex": 251,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47655,9 +47657,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47670,9 +47670,11 @@
                     "portName": null,
                     "ifIndex": 252,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47762,9 +47764,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47777,9 +47777,11 @@
                     "portName": null,
                     "ifIndex": 253,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47869,9 +47871,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47884,9 +47884,11 @@
                     "portName": null,
                     "ifIndex": 254,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -47976,9 +47978,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -47991,9 +47991,11 @@
                     "portName": null,
                     "ifIndex": 255,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48083,9 +48085,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48098,9 +48098,11 @@
                     "portName": null,
                     "ifIndex": 256,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48190,9 +48192,7 @@
                     "ifOutMulticastPkts": 46978,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48205,9 +48205,11 @@
                     "portName": null,
                     "ifIndex": 257,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48297,9 +48299,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48312,9 +48312,11 @@
                     "portName": null,
                     "ifIndex": 258,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48404,9 +48406,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48419,9 +48419,11 @@
                     "portName": null,
                     "ifIndex": 259,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48511,9 +48513,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48526,9 +48526,11 @@
                     "portName": null,
                     "ifIndex": 260,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48618,9 +48620,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48633,9 +48633,11 @@
                     "portName": null,
                     "ifIndex": 261,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48725,9 +48727,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48740,9 +48740,11 @@
                     "portName": null,
                     "ifIndex": 262,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48832,9 +48834,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48847,9 +48847,11 @@
                     "portName": null,
                     "ifIndex": 263,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -48939,9 +48941,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -48954,9 +48954,11 @@
                     "portName": null,
                     "ifIndex": 264,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49046,9 +49048,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49061,9 +49061,11 @@
                     "portName": null,
                     "ifIndex": 265,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49153,9 +49155,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49168,9 +49168,11 @@
                     "portName": null,
                     "ifIndex": 266,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49260,9 +49262,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49275,9 +49275,11 @@
                     "portName": null,
                     "ifIndex": 267,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49367,9 +49369,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49382,9 +49382,11 @@
                     "portName": null,
                     "ifIndex": 268,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49474,9 +49476,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49489,9 +49489,11 @@
                     "portName": null,
                     "ifIndex": 269,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49581,9 +49583,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49596,9 +49596,11 @@
                     "portName": null,
                     "ifIndex": 270,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49688,9 +49690,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49703,9 +49703,11 @@
                     "portName": null,
                     "ifIndex": 271,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49795,9 +49797,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49810,9 +49810,11 @@
                     "portName": null,
                     "ifIndex": 272,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -49902,9 +49904,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -49917,9 +49917,11 @@
                     "portName": null,
                     "ifIndex": 273,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50009,9 +50011,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50024,9 +50024,11 @@
                     "portName": null,
                     "ifIndex": 274,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50116,9 +50118,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50131,9 +50131,11 @@
                     "portName": null,
                     "ifIndex": 275,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50223,9 +50225,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50238,9 +50238,11 @@
                     "portName": null,
                     "ifIndex": 276,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50330,9 +50332,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50345,9 +50345,11 @@
                     "portName": null,
                     "ifIndex": 277,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50437,9 +50439,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50452,9 +50452,11 @@
                     "portName": null,
                     "ifIndex": 278,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50544,9 +50546,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50559,9 +50559,11 @@
                     "portName": null,
                     "ifIndex": 279,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50651,9 +50653,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50666,9 +50666,11 @@
                     "portName": null,
                     "ifIndex": 280,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50758,9 +50760,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50773,9 +50773,11 @@
                     "portName": null,
                     "ifIndex": 281,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50865,9 +50867,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50880,9 +50880,11 @@
                     "portName": null,
                     "ifIndex": 282,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -50972,9 +50974,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -50987,9 +50987,11 @@
                     "portName": null,
                     "ifIndex": 283,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51079,9 +51081,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51094,9 +51094,11 @@
                     "portName": null,
                     "ifIndex": 284,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51186,9 +51188,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51201,9 +51201,11 @@
                     "portName": null,
                     "ifIndex": 285,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51293,9 +51295,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51308,9 +51308,11 @@
                     "portName": null,
                     "ifIndex": 286,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51400,9 +51402,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51415,9 +51415,11 @@
                     "portName": null,
                     "ifIndex": 287,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51507,9 +51509,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51522,9 +51522,11 @@
                     "portName": null,
                     "ifIndex": 288,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51614,9 +51616,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51629,9 +51629,11 @@
                     "portName": null,
                     "ifIndex": 289,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51721,9 +51723,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51736,9 +51736,11 @@
                     "portName": null,
                     "ifIndex": 290,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51828,9 +51830,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51843,9 +51843,11 @@
                     "portName": null,
                     "ifIndex": 291,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -51935,9 +51937,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -51950,9 +51950,11 @@
                     "portName": null,
                     "ifIndex": 292,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52042,9 +52044,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52057,9 +52057,11 @@
                     "portName": null,
                     "ifIndex": 293,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52149,9 +52151,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52164,9 +52164,11 @@
                     "portName": null,
                     "ifIndex": 294,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52256,9 +52258,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52271,9 +52271,11 @@
                     "portName": null,
                     "ifIndex": 295,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52363,9 +52365,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52378,9 +52378,11 @@
                     "portName": null,
                     "ifIndex": 296,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52470,9 +52472,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52485,9 +52485,11 @@
                     "portName": null,
                     "ifIndex": 297,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52577,9 +52579,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52592,9 +52592,11 @@
                     "portName": null,
                     "ifIndex": 298,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52684,9 +52686,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52699,9 +52699,11 @@
                     "portName": null,
                     "ifIndex": 299,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52791,9 +52793,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52806,9 +52806,11 @@
                     "portName": null,
                     "ifIndex": 300,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -52898,9 +52900,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -52913,9 +52913,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53005,9 +53007,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53020,9 +53020,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53112,9 +53114,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53127,9 +53127,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53219,9 +53221,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53234,9 +53234,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53326,9 +53328,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53341,9 +53341,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53433,9 +53435,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53448,9 +53448,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53540,9 +53542,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53555,9 +53555,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53647,9 +53649,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53662,9 +53662,11 @@
                     "portName": null,
                     "ifIndex": 308,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53754,9 +53756,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53769,9 +53769,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53861,9 +53863,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53876,9 +53876,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -53968,9 +53970,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -53983,9 +53983,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54075,9 +54077,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54090,9 +54090,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54182,9 +54184,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54197,9 +54197,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54289,9 +54291,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54304,9 +54304,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54396,9 +54398,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54411,9 +54411,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54503,9 +54505,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54518,9 +54518,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54610,9 +54612,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54625,9 +54625,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54717,9 +54719,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54732,9 +54732,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54824,9 +54826,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54839,9 +54839,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -54931,9 +54933,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -54946,9 +54946,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -55038,9 +55040,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -55053,9 +55053,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -55145,9 +55147,7 @@
                     "ifOutMulticastPkts": 4,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -55160,9 +55160,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "0",
                     "ifPromiscuousMode": "0",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -55252,9 +55254,7 @@
                     "ifOutMulticastPkts": 93968,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }
diff --git a/tests/data/zynos.json b/tests/data/zynos.json
index 85eaed7aa6..cfefa55bcf 100644
--- a/tests/data/zynos.json
+++ b/tests/data/zynos.json
@@ -111,9 +111,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -203,9 +205,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -218,9 +218,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -310,9 +312,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -325,9 +325,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -417,9 +419,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -432,9 +432,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -524,9 +526,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -539,9 +539,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -631,9 +633,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -646,9 +646,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -738,9 +740,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -753,9 +753,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -845,9 +847,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -860,9 +860,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -952,9 +954,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -967,9 +967,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1059,9 +1061,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1074,9 +1074,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1166,9 +1168,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1181,9 +1181,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1273,9 +1275,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1288,9 +1288,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1380,9 +1382,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1395,9 +1395,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1487,9 +1489,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1502,9 +1502,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1594,9 +1596,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1609,9 +1609,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1701,9 +1703,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1716,9 +1716,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1808,9 +1810,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1823,9 +1823,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -1915,9 +1917,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -1930,9 +1930,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2022,9 +2024,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2037,9 +2037,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2129,9 +2131,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2144,9 +2144,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2236,9 +2238,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2251,9 +2251,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2343,9 +2345,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2358,9 +2358,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2450,9 +2452,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2465,9 +2465,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2557,9 +2559,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2572,9 +2572,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2664,9 +2666,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2679,9 +2679,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2771,9 +2773,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2786,9 +2786,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2878,9 +2880,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -2893,9 +2893,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -2985,9 +2987,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3000,9 +3000,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3092,9 +3094,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3107,9 +3107,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3199,9 +3201,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3214,9 +3214,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3306,9 +3308,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3321,9 +3321,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3413,9 +3415,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3428,9 +3428,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3520,9 +3522,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3535,9 +3535,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3627,9 +3629,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3642,9 +3642,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3734,9 +3736,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3749,9 +3749,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3841,9 +3843,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3856,9 +3856,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -3948,9 +3950,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -3963,9 +3963,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4055,9 +4057,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4070,9 +4070,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4162,9 +4164,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4177,9 +4177,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4269,9 +4271,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4284,9 +4284,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4376,9 +4378,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4391,9 +4391,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4483,9 +4485,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4498,9 +4498,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4590,9 +4592,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4605,9 +4605,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4697,9 +4699,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4712,9 +4712,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4804,9 +4806,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4819,9 +4819,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -4911,9 +4913,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -4926,9 +4926,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5018,9 +5020,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5033,9 +5033,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5125,9 +5127,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5140,9 +5140,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5232,9 +5234,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5247,9 +5247,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5339,9 +5341,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5354,9 +5354,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5446,9 +5448,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5461,9 +5461,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -5553,9 +5555,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5568,9 +5568,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5660,9 +5662,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5675,9 +5675,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5767,9 +5769,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5782,9 +5782,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5874,9 +5876,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5889,9 +5889,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -5981,9 +5983,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -5996,9 +5996,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6088,9 +6090,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6103,9 +6103,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6195,9 +6197,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6210,9 +6210,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6302,9 +6304,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6317,9 +6317,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6409,9 +6411,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6424,9 +6424,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6516,9 +6518,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6531,9 +6531,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6623,9 +6625,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6638,9 +6638,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6730,9 +6732,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6745,9 +6745,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6837,9 +6839,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6852,9 +6852,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -6944,9 +6946,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -6959,9 +6959,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7051,9 +7053,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7066,9 +7066,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7158,9 +7160,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7173,9 +7173,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7265,9 +7267,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7280,9 +7280,11 @@
                     "portName": null,
                     "ifIndex": 308,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7372,9 +7374,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7387,9 +7387,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7479,9 +7481,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7494,9 +7494,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7586,9 +7588,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7601,9 +7601,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7693,9 +7695,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7708,9 +7708,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7800,9 +7802,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7815,9 +7815,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -7907,9 +7909,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -7922,9 +7922,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8014,9 +8016,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8029,9 +8029,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8121,9 +8123,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8136,9 +8136,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8228,9 +8230,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8243,9 +8243,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8335,9 +8337,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8350,9 +8350,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8442,9 +8444,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8457,9 +8457,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8549,9 +8551,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8564,9 +8564,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8656,9 +8658,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8671,9 +8671,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -8763,9 +8765,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -8778,9 +8778,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8870,9 +8872,7 @@
                     "ifOutMulticastPkts": null,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8885,9 +8885,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -8977,9 +8979,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -8992,9 +8992,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9084,9 +9086,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
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@@ -9099,9 +9099,11 @@
                     "portName": null,
                     "ifIndex": 325,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9191,9 +9193,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
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                 {
                     "port_descr_type": null,
@@ -9206,9 +9206,11 @@
                     "portName": null,
                     "ifIndex": 326,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9298,9 +9300,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9313,9 +9313,11 @@
                     "portName": null,
                     "ifIndex": 327,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9405,9 +9407,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9420,9 +9420,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9512,9 +9514,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9527,9 +9527,11 @@
                     "portName": null,
                     "ifIndex": 329,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9619,9 +9621,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9634,9 +9634,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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@@ -9726,9 +9728,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9741,9 +9741,11 @@
                     "portName": null,
                     "ifIndex": 401,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9833,9 +9835,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9848,9 +9848,11 @@
                     "portName": null,
                     "ifIndex": 402,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -9940,9 +9942,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -9955,9 +9955,11 @@
                     "portName": null,
                     "ifIndex": 403,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10047,9 +10049,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10062,9 +10062,11 @@
                     "portName": null,
                     "ifIndex": 404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10154,9 +10156,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10169,9 +10169,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10261,9 +10263,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10276,9 +10276,11 @@
                     "portName": null,
                     "ifIndex": 406,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10368,9 +10370,7 @@
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                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10383,9 +10383,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10475,9 +10477,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10490,9 +10490,11 @@
                     "portName": null,
                     "ifIndex": 408,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10582,9 +10584,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10597,9 +10597,11 @@
                     "portName": null,
                     "ifIndex": 409,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10689,9 +10691,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10704,9 +10704,11 @@
                     "portName": null,
                     "ifIndex": 410,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -10796,9 +10798,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10811,9 +10811,11 @@
                     "portName": null,
                     "ifIndex": 411,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -10903,9 +10905,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -10918,9 +10918,11 @@
                     "portName": null,
                     "ifIndex": 412,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11010,9 +11012,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11025,9 +11025,11 @@
                     "portName": null,
                     "ifIndex": 413,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11117,9 +11119,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11132,9 +11132,11 @@
                     "portName": null,
                     "ifIndex": 414,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -11224,9 +11226,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11239,9 +11239,11 @@
                     "portName": null,
                     "ifIndex": 415,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11331,9 +11333,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11346,9 +11346,11 @@
                     "portName": null,
                     "ifIndex": 416,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11438,9 +11440,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11453,9 +11453,11 @@
                     "portName": null,
                     "ifIndex": 417,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11545,9 +11547,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11560,9 +11560,11 @@
                     "portName": null,
                     "ifIndex": 418,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11652,9 +11654,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11667,9 +11667,11 @@
                     "portName": null,
                     "ifIndex": 419,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11759,9 +11761,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11774,9 +11774,11 @@
                     "portName": null,
                     "ifIndex": 420,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11866,9 +11868,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11881,9 +11881,11 @@
                     "portName": null,
                     "ifIndex": 421,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
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                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
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                     "ifAdminStatus": null,
@@ -11973,9 +11975,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -11988,9 +11988,11 @@
                     "portName": null,
                     "ifIndex": 422,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12080,9 +12082,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12095,9 +12095,11 @@
                     "portName": null,
                     "ifIndex": 423,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12187,9 +12189,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12202,9 +12202,11 @@
                     "portName": null,
                     "ifIndex": 424,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12294,9 +12296,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12309,9 +12309,11 @@
                     "portName": null,
                     "ifIndex": 425,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12401,9 +12403,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12416,9 +12416,11 @@
                     "portName": null,
                     "ifIndex": 426,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12508,9 +12510,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12523,9 +12523,11 @@
                     "portName": null,
                     "ifIndex": 427,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12615,9 +12617,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12630,9 +12630,11 @@
                     "portName": null,
                     "ifIndex": 428,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12722,9 +12724,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12737,9 +12737,11 @@
                     "portName": null,
                     "ifIndex": 429,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12829,9 +12831,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12844,9 +12844,11 @@
                     "portName": null,
                     "ifIndex": 430,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -12936,9 +12938,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -12951,9 +12951,11 @@
                     "portName": null,
                     "ifIndex": 10000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13043,9 +13045,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13058,9 +13058,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13150,9 +13152,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13165,9 +13165,11 @@
                     "portName": null,
                     "ifIndex": 20001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13257,9 +13259,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13272,9 +13272,11 @@
                     "portName": null,
                     "ifIndex": 20002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13364,9 +13366,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13379,9 +13379,11 @@
                     "portName": null,
                     "ifIndex": 20003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13471,9 +13473,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13486,9 +13486,11 @@
                     "portName": null,
                     "ifIndex": 20005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": null,
                     "ifAdminStatus": null,
@@ -13578,9 +13580,7 @@
                     "ifOutMulticastPkts": null,
                     "ifOutMulticastPkts_prev": null,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         },
@@ -13597,9 +13597,11 @@
                     "portName": null,
                     "ifIndex": 101,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13689,9 +13691,7 @@
                     "ifOutMulticastPkts": 354930,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13704,9 +13704,11 @@
                     "portName": null,
                     "ifIndex": 102,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13796,9 +13798,7 @@
                     "ifOutMulticastPkts": 1063977,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13811,9 +13811,11 @@
                     "portName": null,
                     "ifIndex": 103,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -13903,9 +13905,7 @@
                     "ifOutMulticastPkts": 1077509,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -13918,9 +13918,11 @@
                     "portName": null,
                     "ifIndex": 104,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14010,9 +14012,7 @@
                     "ifOutMulticastPkts": 629479,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14025,9 +14025,11 @@
                     "portName": null,
                     "ifIndex": 105,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14117,9 +14119,7 @@
                     "ifOutMulticastPkts": 1077537,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14132,9 +14132,11 @@
                     "portName": null,
                     "ifIndex": 106,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14224,9 +14226,7 @@
                     "ifOutMulticastPkts": 1077549,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14239,9 +14239,11 @@
                     "portName": null,
                     "ifIndex": 107,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14331,9 +14333,7 @@
                     "ifOutMulticastPkts": 1034205,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14346,9 +14346,11 @@
                     "portName": null,
                     "ifIndex": 108,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14438,9 +14440,7 @@
                     "ifOutMulticastPkts": 627823,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14453,9 +14453,11 @@
                     "portName": null,
                     "ifIndex": 109,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14545,9 +14547,7 @@
                     "ifOutMulticastPkts": 1077211,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14560,9 +14560,11 @@
                     "portName": null,
                     "ifIndex": 110,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14652,9 +14654,7 @@
                     "ifOutMulticastPkts": 1040793,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14667,9 +14667,11 @@
                     "portName": null,
                     "ifIndex": 111,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14759,9 +14761,7 @@
                     "ifOutMulticastPkts": 1076696,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14774,9 +14774,11 @@
                     "portName": null,
                     "ifIndex": 112,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14866,9 +14868,7 @@
                     "ifOutMulticastPkts": 1068882,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14881,9 +14881,11 @@
                     "portName": null,
                     "ifIndex": 113,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -14973,9 +14975,7 @@
                     "ifOutMulticastPkts": 988888,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -14988,9 +14988,11 @@
                     "portName": null,
                     "ifIndex": 114,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15080,9 +15082,7 @@
                     "ifOutMulticastPkts": 1075590,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15095,9 +15095,11 @@
                     "portName": null,
                     "ifIndex": 115,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15187,9 +15189,7 @@
                     "ifOutMulticastPkts": 715731,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15202,9 +15202,11 @@
                     "portName": null,
                     "ifIndex": 116,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15294,9 +15296,7 @@
                     "ifOutMulticastPkts": 1076597,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15309,9 +15309,11 @@
                     "portName": null,
                     "ifIndex": 117,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15401,9 +15403,7 @@
                     "ifOutMulticastPkts": 545415,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15416,9 +15416,11 @@
                     "portName": null,
                     "ifIndex": 118,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15508,9 +15510,7 @@
                     "ifOutMulticastPkts": 646482,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15523,9 +15523,11 @@
                     "portName": null,
                     "ifIndex": 119,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15615,9 +15617,7 @@
                     "ifOutMulticastPkts": 1077365,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15630,9 +15630,11 @@
                     "portName": null,
                     "ifIndex": 120,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15722,9 +15724,7 @@
                     "ifOutMulticastPkts": 878247,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15737,9 +15737,11 @@
                     "portName": null,
                     "ifIndex": 121,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15829,9 +15831,7 @@
                     "ifOutMulticastPkts": 1038143,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15844,9 +15844,11 @@
                     "portName": null,
                     "ifIndex": 122,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -15936,9 +15938,7 @@
                     "ifOutMulticastPkts": 240394,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -15951,9 +15951,11 @@
                     "portName": null,
                     "ifIndex": 123,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16043,9 +16045,7 @@
                     "ifOutMulticastPkts": 223266,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16058,9 +16058,11 @@
                     "portName": null,
                     "ifIndex": 124,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16150,9 +16152,7 @@
                     "ifOutMulticastPkts": 1016669,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16165,9 +16165,11 @@
                     "portName": null,
                     "ifIndex": 125,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16257,9 +16259,7 @@
                     "ifOutMulticastPkts": 1072331,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16272,9 +16272,11 @@
                     "portName": null,
                     "ifIndex": 126,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16364,9 +16366,7 @@
                     "ifOutMulticastPkts": 1073369,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16379,9 +16379,11 @@
                     "portName": null,
                     "ifIndex": 127,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16471,9 +16473,7 @@
                     "ifOutMulticastPkts": 293423,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16486,9 +16486,11 @@
                     "portName": null,
                     "ifIndex": 128,
                     "ifSpeed": 100000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 100,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16578,9 +16580,7 @@
                     "ifOutMulticastPkts": 10845973,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16593,9 +16593,11 @@
                     "portName": null,
                     "ifIndex": 129,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -16685,9 +16687,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16700,9 +16700,11 @@
                     "portName": null,
                     "ifIndex": 130,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16792,9 +16794,7 @@
                     "ifOutMulticastPkts": 1351619,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16807,9 +16807,11 @@
                     "portName": null,
                     "ifIndex": 201,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -16899,9 +16901,7 @@
                     "ifOutMulticastPkts": 582297,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -16914,9 +16914,11 @@
                     "portName": null,
                     "ifIndex": 202,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17006,9 +17008,7 @@
                     "ifOutMulticastPkts": 672990,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17021,9 +17021,11 @@
                     "portName": null,
                     "ifIndex": 203,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17113,9 +17115,7 @@
                     "ifOutMulticastPkts": 672992,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17128,9 +17128,11 @@
                     "portName": null,
                     "ifIndex": 204,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17220,9 +17222,7 @@
                     "ifOutMulticastPkts": 223253,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17235,9 +17235,11 @@
                     "portName": null,
                     "ifIndex": 205,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17327,9 +17329,7 @@
                     "ifOutMulticastPkts": 663244,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17342,9 +17342,11 @@
                     "portName": null,
                     "ifIndex": 206,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17434,9 +17436,7 @@
                     "ifOutMulticastPkts": 628908,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17449,9 +17449,11 @@
                     "portName": null,
                     "ifIndex": 207,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17541,9 +17543,7 @@
                     "ifOutMulticastPkts": 484743,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17556,9 +17556,11 @@
                     "portName": null,
                     "ifIndex": 208,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17648,9 +17650,7 @@
                     "ifOutMulticastPkts": 484448,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17663,9 +17663,11 @@
                     "portName": null,
                     "ifIndex": 209,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17755,9 +17757,7 @@
                     "ifOutMulticastPkts": 487879,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17770,9 +17770,11 @@
                     "portName": null,
                     "ifIndex": 210,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17862,9 +17864,7 @@
                     "ifOutMulticastPkts": 487886,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17877,9 +17877,11 @@
                     "portName": null,
                     "ifIndex": 211,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -17969,9 +17971,7 @@
                     "ifOutMulticastPkts": 312672,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -17984,9 +17984,11 @@
                     "portName": null,
                     "ifIndex": 212,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18076,9 +18078,7 @@
                     "ifOutMulticastPkts": 243391,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18091,9 +18091,11 @@
                     "portName": null,
                     "ifIndex": 213,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18183,9 +18185,7 @@
                     "ifOutMulticastPkts": 240340,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18198,9 +18198,11 @@
                     "portName": null,
                     "ifIndex": 214,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18290,9 +18292,7 @@
                     "ifOutMulticastPkts": 233695,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18305,9 +18305,11 @@
                     "portName": null,
                     "ifIndex": 215,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18397,9 +18399,7 @@
                     "ifOutMulticastPkts": 206535,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18412,9 +18412,11 @@
                     "portName": null,
                     "ifIndex": 216,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18504,9 +18506,7 @@
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18519,9 +18519,11 @@
                     "portName": null,
                     "ifIndex": 217,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18611,9 +18613,7 @@
                     "ifOutMulticastPkts": 734032,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18626,9 +18626,11 @@
                     "portName": null,
                     "ifIndex": 218,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "down",
@@ -18718,9 +18720,7 @@
                     "ifOutMulticastPkts": 0,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18733,9 +18733,11 @@
                     "portName": null,
                     "ifIndex": 219,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18825,9 +18827,7 @@
                     "ifOutMulticastPkts": 1075482,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18840,9 +18840,11 @@
                     "portName": null,
                     "ifIndex": 220,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -18932,9 +18934,7 @@
                     "ifOutMulticastPkts": 1077542,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -18947,9 +18947,11 @@
                     "portName": null,
                     "ifIndex": 221,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19039,9 +19041,7 @@
                     "ifOutMulticastPkts": 776903,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19054,9 +19054,11 @@
                     "portName": null,
                     "ifIndex": 222,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19146,9 +19148,7 @@
                     "ifOutMulticastPkts": 1055513,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19161,9 +19161,11 @@
                     "portName": null,
                     "ifIndex": 223,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19253,9 +19255,7 @@
                     "ifOutMulticastPkts": 200166,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19268,9 +19268,11 @@
                     "portName": null,
                     "ifIndex": 224,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19360,9 +19362,7 @@
                     "ifOutMulticastPkts": 1039676,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19375,9 +19375,11 @@
                     "portName": null,
                     "ifIndex": 225,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19467,9 +19469,7 @@
                     "ifOutMulticastPkts": 1074312,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19482,9 +19482,11 @@
                     "portName": null,
                     "ifIndex": 226,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19574,9 +19576,7 @@
                     "ifOutMulticastPkts": 976924,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19589,9 +19589,11 @@
                     "portName": null,
                     "ifIndex": 227,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19681,9 +19683,7 @@
                     "ifOutMulticastPkts": 470130,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19696,9 +19696,11 @@
                     "portName": null,
                     "ifIndex": 228,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19788,9 +19790,7 @@
                     "ifOutMulticastPkts": 220692,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19803,9 +19803,11 @@
                     "portName": null,
                     "ifIndex": 229,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -19895,9 +19897,7 @@
                     "ifOutMulticastPkts": 691150,
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                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -19910,9 +19910,11 @@
                     "portName": null,
                     "ifIndex": 230,
                     "ifSpeed": 10000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 10000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20002,9 +20004,7 @@
                     "ifOutMulticastPkts": 779369,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20017,9 +20017,11 @@
                     "portName": null,
                     "ifIndex": 301,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20109,9 +20111,7 @@
                     "ifOutMulticastPkts": 671750,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20124,9 +20124,11 @@
                     "portName": null,
                     "ifIndex": 302,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20216,9 +20218,7 @@
                     "ifOutMulticastPkts": 672618,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20231,9 +20231,11 @@
                     "portName": null,
                     "ifIndex": 303,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20323,9 +20325,7 @@
                     "ifOutMulticastPkts": 664072,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20338,9 +20338,11 @@
                     "portName": null,
                     "ifIndex": 304,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20430,9 +20432,7 @@
                     "ifOutMulticastPkts": 545477,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20445,9 +20445,11 @@
                     "portName": null,
                     "ifIndex": 305,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20537,9 +20539,7 @@
                     "ifOutMulticastPkts": 580492,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20552,9 +20552,11 @@
                     "portName": null,
                     "ifIndex": 306,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20644,9 +20646,7 @@
                     "ifOutMulticastPkts": 656165,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20659,9 +20659,11 @@
                     "portName": null,
                     "ifIndex": 307,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20751,9 +20753,7 @@
                     "ifOutMulticastPkts": 669403,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20766,9 +20766,11 @@
                     "portName": null,
                     "ifIndex": 308,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20858,9 +20860,7 @@
                     "ifOutMulticastPkts": 672443,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20873,9 +20873,11 @@
                     "portName": null,
                     "ifIndex": 309,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -20965,9 +20967,7 @@
                     "ifOutMulticastPkts": 672474,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -20980,9 +20980,11 @@
                     "portName": null,
                     "ifIndex": 310,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21072,9 +21074,7 @@
                     "ifOutMulticastPkts": 672970,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21087,9 +21087,11 @@
                     "portName": null,
                     "ifIndex": 311,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21179,9 +21181,7 @@
                     "ifOutMulticastPkts": 672872,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21194,9 +21194,11 @@
                     "portName": null,
                     "ifIndex": 312,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21286,9 +21288,7 @@
                     "ifOutMulticastPkts": 672943,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21301,9 +21301,11 @@
                     "portName": null,
                     "ifIndex": 313,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -21393,9 +21395,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21408,9 +21408,11 @@
                     "portName": null,
                     "ifIndex": 314,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21500,9 +21502,7 @@
                     "ifOutMulticastPkts": 672940,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21515,9 +21515,11 @@
                     "portName": null,
                     "ifIndex": 315,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21607,9 +21609,7 @@
                     "ifOutMulticastPkts": 669197,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21622,9 +21622,11 @@
                     "portName": null,
                     "ifIndex": 316,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21714,9 +21716,7 @@
                     "ifOutMulticastPkts": 666292,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21729,9 +21729,11 @@
                     "portName": null,
                     "ifIndex": 317,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21821,9 +21823,7 @@
                     "ifOutMulticastPkts": 672534,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21836,9 +21836,11 @@
                     "portName": null,
                     "ifIndex": 318,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -21928,9 +21930,7 @@
                     "ifOutMulticastPkts": 358584,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -21943,9 +21943,11 @@
                     "portName": null,
                     "ifIndex": 319,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -22035,9 +22037,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22050,9 +22050,11 @@
                     "portName": null,
                     "ifIndex": 320,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22142,9 +22144,7 @@
                     "ifOutMulticastPkts": 629319,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22157,9 +22157,11 @@
                     "portName": null,
                     "ifIndex": 321,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22249,9 +22251,7 @@
                     "ifOutMulticastPkts": 652102,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22264,9 +22264,11 @@
                     "portName": null,
                     "ifIndex": 322,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22356,9 +22358,7 @@
                     "ifOutMulticastPkts": 651861,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22371,9 +22371,11 @@
                     "portName": null,
                     "ifIndex": 323,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22463,9 +22465,7 @@
                     "ifOutMulticastPkts": 652167,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22478,9 +22478,11 @@
                     "portName": null,
                     "ifIndex": 324,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22570,9 +22572,7 @@
                     "ifOutMulticastPkts": 654730,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22585,9 +22585,11 @@
                     "portName": null,
                     "ifIndex": 325,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22677,9 +22679,7 @@
                     "ifOutMulticastPkts": 519464,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22692,9 +22692,11 @@
                     "portName": null,
                     "ifIndex": 326,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22784,9 +22786,7 @@
                     "ifOutMulticastPkts": 651730,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22799,9 +22799,11 @@
                     "portName": null,
                     "ifIndex": 327,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22891,9 +22893,7 @@
                     "ifOutMulticastPkts": 240601,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -22906,9 +22906,11 @@
                     "portName": null,
                     "ifIndex": 328,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -22998,9 +23000,7 @@
                     "ifOutMulticastPkts": 240623,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23013,9 +23013,11 @@
                     "portName": null,
                     "ifIndex": 329,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23105,9 +23107,7 @@
                     "ifOutMulticastPkts": 591419,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23120,9 +23120,11 @@
                     "portName": null,
                     "ifIndex": 330,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23212,9 +23214,7 @@
                     "ifOutMulticastPkts": 588803,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23227,9 +23227,11 @@
                     "portName": null,
                     "ifIndex": 401,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23319,9 +23321,7 @@
                     "ifOutMulticastPkts": 369738,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23334,9 +23334,11 @@
                     "portName": null,
                     "ifIndex": 402,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23426,9 +23428,7 @@
                     "ifOutMulticastPkts": 369729,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23441,9 +23441,11 @@
                     "portName": null,
                     "ifIndex": 403,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23533,9 +23535,7 @@
                     "ifOutMulticastPkts": 153716,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23548,9 +23548,11 @@
                     "portName": null,
                     "ifIndex": 404,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -23640,9 +23642,7 @@
                     "ifOutMulticastPkts": 369254,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23655,9 +23655,11 @@
                     "portName": null,
                     "ifIndex": 405,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23747,9 +23749,7 @@
                     "ifOutMulticastPkts": 435191,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23762,9 +23762,11 @@
                     "portName": null,
                     "ifIndex": 406,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23854,9 +23856,7 @@
                     "ifOutMulticastPkts": 163080,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23869,9 +23869,11 @@
                     "portName": null,
                     "ifIndex": 407,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -23961,9 +23963,7 @@
                     "ifOutMulticastPkts": 675759,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -23976,9 +23976,11 @@
                     "portName": null,
                     "ifIndex": 408,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24068,9 +24070,7 @@
                     "ifOutMulticastPkts": 409539,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24083,9 +24083,11 @@
                     "portName": null,
                     "ifIndex": 409,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24175,9 +24177,7 @@
                     "ifOutMulticastPkts": 1037703,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24190,9 +24190,11 @@
                     "portName": null,
                     "ifIndex": 410,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24282,9 +24284,7 @@
                     "ifOutMulticastPkts": 634472,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24297,9 +24297,11 @@
                     "portName": null,
                     "ifIndex": 411,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24389,9 +24391,7 @@
                     "ifOutMulticastPkts": 675698,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24404,9 +24404,11 @@
                     "portName": null,
                     "ifIndex": 412,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24496,9 +24498,7 @@
                     "ifOutMulticastPkts": 1048856,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24511,9 +24511,11 @@
                     "portName": null,
                     "ifIndex": 413,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24603,9 +24605,7 @@
                     "ifOutMulticastPkts": 707059,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24618,9 +24618,11 @@
                     "portName": null,
                     "ifIndex": 414,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24710,9 +24712,7 @@
                     "ifOutMulticastPkts": 673230,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24725,9 +24725,11 @@
                     "portName": null,
                     "ifIndex": 415,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24817,9 +24819,7 @@
                     "ifOutMulticastPkts": 1072388,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24832,9 +24832,11 @@
                     "portName": null,
                     "ifIndex": 416,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -24924,9 +24926,7 @@
                     "ifOutMulticastPkts": 1043080,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -24939,9 +24939,11 @@
                     "portName": null,
                     "ifIndex": 417,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25031,9 +25033,7 @@
                     "ifOutMulticastPkts": 1068837,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25046,9 +25046,11 @@
                     "portName": null,
                     "ifIndex": 418,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25138,9 +25140,7 @@
                     "ifOutMulticastPkts": 1071568,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25153,9 +25153,11 @@
                     "portName": null,
                     "ifIndex": 419,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25245,9 +25247,7 @@
                     "ifOutMulticastPkts": 1072009,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25260,9 +25260,11 @@
                     "portName": null,
                     "ifIndex": 420,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25352,9 +25354,7 @@
                     "ifOutMulticastPkts": 1073812,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25367,9 +25367,11 @@
                     "portName": null,
                     "ifIndex": 421,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25459,9 +25461,7 @@
                     "ifOutMulticastPkts": 1076742,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25474,9 +25474,11 @@
                     "portName": null,
                     "ifIndex": 422,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25566,9 +25568,7 @@
                     "ifOutMulticastPkts": 968231,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25581,9 +25581,11 @@
                     "portName": null,
                     "ifIndex": 423,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25673,9 +25675,7 @@
                     "ifOutMulticastPkts": 1076797,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25688,9 +25688,11 @@
                     "portName": null,
                     "ifIndex": 424,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25780,9 +25782,7 @@
                     "ifOutMulticastPkts": 820165,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25795,9 +25795,11 @@
                     "portName": null,
                     "ifIndex": 425,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25887,9 +25889,7 @@
                     "ifOutMulticastPkts": 1077291,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -25902,9 +25902,11 @@
                     "portName": null,
                     "ifIndex": 426,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -25994,9 +25996,7 @@
                     "ifOutMulticastPkts": 1077072,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26009,9 +26009,11 @@
                     "portName": null,
                     "ifIndex": 427,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26101,9 +26103,7 @@
                     "ifOutMulticastPkts": 1077276,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26116,9 +26116,11 @@
                     "portName": null,
                     "ifIndex": 428,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26208,9 +26210,7 @@
                     "ifOutMulticastPkts": 1074811,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26223,9 +26223,11 @@
                     "portName": null,
                     "ifIndex": 429,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26315,9 +26317,7 @@
                     "ifOutMulticastPkts": 842953,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26330,9 +26330,11 @@
                     "portName": null,
                     "ifIndex": 430,
                     "ifSpeed": 1000000000,
+                    "ifSpeed_prev": null,
                     "ifConnectorPresent": "false",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 1000,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26422,9 +26424,7 @@
                     "ifOutMulticastPkts": 1077057,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26437,9 +26437,11 @@
                     "portName": null,
                     "ifIndex": 10000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": "true",
                     "ifPromiscuousMode": "true",
                     "ifHighSpeed": 0,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "down",
                     "ifOperStatus_prev": "down",
                     "ifAdminStatus": "up",
@@ -26529,9 +26531,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26544,9 +26544,11 @@
                     "portName": null,
                     "ifIndex": 20000,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26636,9 +26638,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26651,9 +26651,11 @@
                     "portName": null,
                     "ifIndex": 20001,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26743,9 +26745,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26758,9 +26758,11 @@
                     "portName": null,
                     "ifIndex": 20002,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26850,9 +26852,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26865,9 +26865,11 @@
                     "portName": null,
                     "ifIndex": 20003,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -26957,9 +26959,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 },
                 {
                     "port_descr_type": null,
@@ -26972,9 +26972,11 @@
                     "portName": null,
                     "ifIndex": 20005,
                     "ifSpeed": null,
+                    "ifSpeed_prev": 0,
                     "ifConnectorPresent": null,
                     "ifPromiscuousMode": null,
                     "ifHighSpeed": null,
+                    "ifHighSpeed_prev": null,
                     "ifOperStatus": "up",
                     "ifOperStatus_prev": "up",
                     "ifAdminStatus": "up",
@@ -27064,9 +27066,7 @@
                     "ifOutMulticastPkts": 0,
                     "ifOutMulticastPkts_prev": 0,
                     "ifOutMulticastPkts_delta": null,
-                    "ifOutMulticastPkts_rate": null,
-                    "ifSpeed_prev": null,
-                    "ifHighSpeed_prev": null
+                    "ifOutMulticastPkts_rate": null
                 }
             ]
         }